Nobody knows about these?
I suspect many of us know about them, actually. Again, you need to exercise some patience on the forum...we're not all just hanging out here all the time.
My opinion on this fabric is that they're fairly rare, but do show up on eBay somewhat regularly. If you can pick up a piece, I would do so. Don't recall what I paid for my chunk, but it was also a while back. I seem to recall a bunch of it being found/offered by a seller a few months back.