New Bench Seat Covers hard to get?

Youre right with the money spending. ;-) Its about idealism. The problem here in Germany is that I cannot simply switch to other seats. If I would install some more "modern" ones, the vehicle registration office and the technical surveillance office will not give the car a street allowance. It has to be in "as possible" original condition for a "oldtimer" street allowance. Same for the engine and all other mods I like to do.