For the record, I have also heard that the weatherstripping used on car doors is EPDM also. It may be worth checking into. If it is you can probably find some at your local auto parts store.
Would have been a thinner tape, too I bet. Oh well.
I just tried this last week.
http://www.aquariacentral.com/forums/showthread.php?t=228075
(after finding this, I realize I may have posted my build into the wrong forum. oops)