I plan on acquire some felted wool fabric and experimenting with that. Then perhaps I'll be able to make some out of leather.
That technique is not good for felted wool fabric. This material can be torn very easily. So. Take some imitation leather to try.
The leather imitation can be punched through much better than any else fabric. Also it looks as leather.
For example I have two Lestovkis(funny English-Russian mixed word) leather made one and imitation another. Natural one is much nicer, but second is good too.
I had seen fabric-made lestovka only once. One lady who was keeper of old rituals had used it. That lestovka was made in different way. Also it was not very usefull lestovka and not completely done. It had no peredvizhniki.