Hey all,
Just wanted to this out there for anyone who might have this issue. Both trim cylinders on my 05 Verado 250 (serial number 1B205753) started leaking a couple months ago. According to my dealer he couldn't buy the seal kit from Mercury anymore and would have had to buy the entire cylinder rebuild kit that was ~$350 per each. Ended up finding Five Star Marine down in Florida who rebuilt both cylinders for $260 per each and they come with a two year warranty.
Hope this might help someone else who has this issue.