Well i work for some german company making 1:1 cars :-)
I didn't ask for the supplier but they're definitely not chinese! The chinese will try to copy it once we put it into production. Until then they'll keep doing plastic :-)
A couple of years ago at the CeBIT computer show i saw a supplier that had a desktop laser system that would burn/cut a vector graphic into most materials. That would work nice for you now. The investment would be a bit out of control though:-) I had phantasies of getting one for doing photoetch...
Jelp is right. Maybe you can find some local company with a machine that does it for a reasonable price. They are not so uncommon anymore.
On the other hand, if you have the right mesh and get a useful chunk of it, you could lay it flat, make a silicone negative and then do thin positive copies from silicone or latex and cover the seat master with those "foils". It's being done like that on 1:1 clay design models to show textures on dashboards and door trim.