530 409 6101
The door latch, with the flush push-button to open from the exterior is part # 13878-00, but likely some other latch from something else could be made to function. And the spring seems to need to be about 8" long. It assists the bench seat in sliding forward.
Any information you have along these lines would be great. The salvage places I checked are all no-stock, and McFarlane, Wicks, etc. don't have either. Thanks for checking.