CSTsales has it in more reasonable quantities.
https://www.cstsales.com/a-carbon-fiber-tissue-veil.html
That's the stuff that wasn't working for me.
edit: BUT:
At the contest yesterday I had conversation with a couple of folks, one who uses the CST stuff with Minwax Polycrylic, and one who uses stuff from Fiberglast with epoxy, and they both reported no problems.
So I just ripped a square of the stuff off of my roll and tried moistening it with plain old
water, and it seems to work just fine. Since using dope on water-soaked silkspan works out A-OK, I think I have found the correct solvent and now have a solution!
If it turns to crap when it dries, I'll report back here. Otherwise -- all is quiet on the Western Front.