I'm looking for a pull up preferably the way we all seem to like them ... plastic backed, however I'm of a large size and could in no stretch of the imagination, or elastic, fit the sizes from stores online and off. At a couple of inches over 6 feet and 250 pounds, my waist size is comfortably 44 inches. I've googled and sometimes can't even tell from the ads if a pull up is plastic backed. Does anyone know of a manufacturer that makes something like what I'm looking for? Thanks.