ideas for replacing engine compartment tar paper/asbestos insulation skirts?

Attached with several "B" clips to the inner fenders in the engine compartment there are tar paper/asbestos skirts that cover the upper control arms. Any ideas for a suitable inexpensive material to make new ones with?


http://www.classicvwbugs.com/shop-fo...on-tar-boards/
A quick search turned up these "insulation tar boards" used in VW bugs...


And I also thought of using something like this.
Roofing tar paper would actually be pretty close to what was used originally.
All you need is a piece of material 1' x 3' to do both sides. Ideally it should be tear-resistant and flexible. Has anyone made their own? Or maybe even new repops are available?
Author: DogBunny