I found it! The yarn that I bought at Stitches West 2019 from this vendor! Slightly darker than mine. It would make a fabulous pair of socks at $20 on closeout. I used the first half of Ostrich Plumes lace for my rainbow effect, because as a lace stole what else could it be.
I didn’t run the end in because I didn’t cut it off because I wanted to have the option of trying it on again and maybe adding just a few last repeats. Again. But at about 16×76″, I think that’ll do.