I found some!...a little easier than expected to boot-
I e-mailed Blitz years ago about that part and its propensity to run away when I wasn't looking. In addition, the only way to get a replacement was to buy a whole new nozzle. Great idea, poor implementation. Lawsuit aside, they probably wouldn't have gone out of business based on the sales of those pesky replacement parts.....
Anyway, they responded and sent me a bunch of them. Guess it was just as easy to throw a handful in the envelope and not much difference in postage.
Shoot me a pm with your mailing address and I'll send 2 out to you tomorrow- no charge- no worry. I only have one blitz can left with that nozzle and it's on its last legs-