Seat rebuild question

j_anderson said
Looks like it might've been woven in to the burlap. Here is a listing in flea-bay. you might even be able to get some of this to use instead?

The kits from legendary use a plastic type burlap, right? maybe that offers the support that the original burlap lacked?

here

They have multiple sizes, just need to measure what these seats need. Price is also reasonable. I've already got some burlap, but only paid $10 for it...