ur talking abt the handles on the faucets? u may be able to find a pair that u can replace them with at Lowes or Home Depot. if u go that route, i'd take the old one with me.
i u have an outside shower, that isn't used, those handles may work.
other than that, F1100turbo has abt the only other option.
you may also want to try these people. it is kind of hit or miss with them. New and Reconditioned RV Parts & Accessories - RV Surplus
ur probably going to find the handles are going to cost as much as the whole thing.
by the way if they ever start dripping, all that is in there is an "O" ring. if u have a rubber and gasket place, they can match them.