Door Panel Fixable?

[1970GMC350]

Hello all. Does anyone on here think this door panel is fixable? The back metal plate has some rust, the vinyl is brittle and there's a big chunk of it missing. Modern reproductions of this design/color are either sold out, backordered or unavailable. If it is fixable, what are some good ways to refurbish the vinyl and patch that section that's missing? I would like to keep the truck as original as possible but I'll understand if this is too far gone and have to wait for a repro. to be back in stock. Thank you in advance for any help!