I used this stuff on my frag tank, works great. I would think any vinyl that is marked waterproof and UV rated is fine. I have used other vinyl before and that is what I looked for.I'd try something like this:
or this:
if it's available in your store. It's cheap so I'd buy 1 of each just to see which I wanted to use. Since they only $1.25 each, if they don't work you're out $2.50.