In our KW T2000 RV-garage in the original sleeper cab space that opens
back into the kitchen-dinette, we would like to put a convertable sofa
bed that could seat facing foward or backward (into the kitenette) or
lay flat for an almost double bed. Does anyone have such a 3-way
convertable sofa bed or know where they could be obtained?

Check with RV Salvage & Surplus in Elkhart,...I've bought a bunch of stuff from them for my conversion including RV furniture.
Ask for Trina,... she owns the place & is quite knowledgable. www.rvsurplussalvage.com