Molding on edge of roof and sidewalls

Sorry, I have looked all over this site and can't find a name for the trim I want. I know a few places sell aluminum and I may have to go with that , but I have seen a couple of teardrops that had vinyl that covered about an inch and a half of the roof and an inch and a half down the sidewall it looked like it used the metal flat trim piece that has a rubber insert in it on top of it for dressing it up. Anyone know where I can buy that stuff? It just seems to be a piece of vinyl with a 90 degree in the middle. Thanks, Bill