That's fabulous Werner! I love your idea.
For what it's worth I used this for a few things
Stretch polyester, thin, lightweight, recycle, 110g/sqm |buy
Lightweight and thin fabric for outdoor use as trousers, shorts for warm seasons as meter-goods, order online at extremtextil
www.extremtextil.de
It might be OK for your needs?
The stretchiness is really quite minimal despite ET's description.
Cheers