[JohnB]

Shields rubber and hose part no 16-14x2x10 is what your looking for. I got mine through my port supply account for 10.76 a 10' roll, used two on the tank. This is the stuff that is UL and USGG approved for this application.

Here is what I found to be problematic. These gas tanks are VERY flat, and these platform decks from the factory ARE NOT. When they were using foam to set it in, if it was off by 3/4" like mine was, no big deal. Foam took up the slack. You want the tank evenly support across the entire length of the tank, and that isn't easy to do with a 9' long tank. I used a level and straight edge, and about 8 hours of work when I put the new tank deck in to make sure it's level. I just test fitted it today, and it's within 1/8" level all the way around, the 5200 will take up that much slack.