Sean,
If I woulda took the cap off mine I would go with the rigid/stainless. The lid was on a little squirley and I didn't want to bust it loose and start over so
I opted for the 'ol stock look. Get it on while it's still warm though or it'll grow on ya and look like crap later.
Foursonsmarine dot com is where I got mine. Heck I think shipping was more than the rail though