Here is pics of a stand/mount that I concocted. Haven't had a chance to mount it to the boat yet.
0-1.jpegThis pic is of the stand collapsed

0.jpegThis pic the stand is exstended.

0-2.jpegParts list.
1-1 piece of 2" schedule 40 pvc by 24" long. (bought from local ace hardware store $3.00)
2-1 piece of what is used for storing your golf club in a bag. Not sure what they call it. It is a black very thin wall tubing type. (borrowed from sons extra golf items)
3-1 piece of 1 1/2" schedule 40 pvc by 24" long (bought from local ace hardware store $2.00)
4-1 black rubber type adapter from 2" to 1 1/2 inch. This has a hose clamp on each end of the adapter. (bought from local ace hardware store $6.00)
5-1 3" floor flange. I believe commonly used for toilets. (bought from local ace hardware store $7.00)
6-1 3" to 2" reducer to fit the floor flange to accept the 2" schedule 40 pvc (bought from local ace hardware store $4.00)
7-1 (1 1/2" sch 40 pvc 45 degree elbow) (bought from local ace hardware store $2.00)
8-1 short piece of 1 1/2 sch 40 pvc. This length would be what you feel is appropriate for your requirements. (already had this but can be purchased at the hardware store also)
9-1 (1 1/2 sch 40 pvc cap) (bought from local ace hardware store $2.00)
10- 1 piece of unistrut 12" long ( had this on hand already but can possibly by from an Electrical Supply company or a electrician friend or try a recycling/scrap yard)
11- 1 (1 1/2 unistrut clamp) (bought from Home Depot $2.00)
12- 1 thumb screw 5/16 by 18 threads per inch. (from local ace hardware store $2.00)
13- 2 small stainless screws (already had on hand but can purchase from hardware store)
Total cost shown $30 without the cost of items I already had on hand.
I inserted the 3" to 2" reducer into the floor flange then placed the 2" sch 40 by 24" into the 2"reducer.
I then cut to length of golf club tubing to 24" and then cut that piece length wise to slip around the 1 1/2" sch 40 by 24"
Then insert the 1 1/2 pvc with the blacker reducer into the 2" sch 40 making sure to push the reducer down to seat the reducer. Make sure the 1 1/2 pvc is extending above the black reducer then tighten the clamp around the 2" black reducer.
Then pull some more of the 1 1/2 pvc out of the black reducer and slowly tighten the 1 1/2 clamp until desired resistance is achieved. This allows for adjusting the 1 1/2 pvc to various heights.
Place the 1 1/2 45 degree pvc elbow on the 1 1/2 pipe and then insert the short length of 1 1/2 pvc into the elbow
Then place the unistrut clamps into the piece of unistrut then onto the 1 1/2 pac, insert the bolt and tighten to the 1 1/2 pvc.
I didn't use glue on any of the connections of pvc. I drilled a small guide/pilot hole into the side of the floor flange assembly going thru the 3" to 2" adapter and the 2" pipe. Then I removed the 2" pipe from the reducer and drilled and tapped the hole for the 5/16 by 18tpi thumb screw into the 2" pvc. Then I drill out the pilot hole on the reducer and floor flange allowing a small amount of clearance(1/64) to allow the 5/16 to pass through to the threaded 2" pvc. I also drilled appropriate size holes into both ends of the 45 degree elbow and used stainless screws to secure the items. This way I can revamp the stand if needed.
I used the heavier walled pvc for strength but you could adapt and use what you like. I started out with aluminum but I could see the cost for now would of been much costlier and I would need someone to weld and machine aluminum couplings so I went the cheaper route for the trial stand. Might go the alum route later.
Also you could adapt this stand to you liking. Forgo the 45 degree elbow and just use the straight piece of pipe to attach the unistrut to.
If not wanting an adjustable stand you could just use a longer length to your desire height of 2" sch 40 pvc but would then need a 2" unistut clamp instead of the 1 1/2" clamp.
I haven't installed the stand yet. This is what I did for myself. You are on your own. Just sharing my experience.
If pics don't show up pm me your e-mail and I will forward the pics.
This might help someone else.