In addition to Sherm's there's also Camp 'n Cruise near Grand Rapids...I think they had a Lake MI guide that got boats through them, so might be worth a shot.

Sherm had a used one a number of years ago when my buddy was shopping for boats and it's a biiiiiggggg boat...lol.

I've not seen a Jaguar in use locally. There aren't actually that many BCBs that I've seen in the area...I know of my Caracal, a Pantera (IV I think), a couple of Cougars, and an Eyra or two that I've run across at ramps/lakes within 1hr-90min of us (I'm in South Bend).