Just bought the ADCO Tyvek "Universal Fit" cover for my 2012 Roo 19. It was on sale for $250 at Camping World. The smallest they make is for a 20ft TT. It doesn't fit anywhere near as nice as all the pics show. It's a foot or two too long and probably a foot or so too wide (better than being too small, though!). Biggest issue is the rain spouts that are at each end of the gutters that run the length of the trailer. When I put it on, one of the spouts immediately put a hole in the cover. The other 3 didn't, but I'm guessing after a winter of winds, they'll probably poke through. Not a show stopper for me at this time. I may have a different opinion next spring, though. The custom made ones are pretty expensive, and I don't think they have any allowances for rain spouts, either.