Where is a good place to buy tonneau covers? I've seen a few sites mentioned on here that have call-only pricing. I'm thinking about getting a Truxedo Pro X15 for my Ram. It looks like most covers are price controlled so the call-only pricing makes sense- and places like this are good to buy from and will my warranty on the cover will be in tact correct? I know sometimes you have to buy from official channels to get the warranty on stuff.