What I always thought would be perfect for an ElCamino was a Stratobench. Don't know if one will fit in a 65 though. If it will you could probably have a custom cover made in 65 pattern. If you don't know what a Stratobench is it is a bench seat with buckets built in and a foldable armrest in the middle. Guess one could be made to fit by cutting the frame down seeing as how custom cover would have to be made anyway. Saw one recently on CL for $250.00
Also there is a sticky in this forum for bench to bucket conversion.