I may be willing/able to sell a Velo Orange Grand Cru track/fixed clincher wheelset, silver/silver/silver high flange.

That said, somebody on Paceline was looking to sell a couple track wheelsets, one of which was Campy C-Rec, silver but low flange, with silver tubular rims. T'other sold, and was not at all what you're looking for (black Paul hubs). Seller's paceline ad had no pix, just linked to this fb marketplace ad:
https://www.facebook.com/marketplace...0636714672596/

I know you said "must be...high flange...", and I do understand the meaning of the word "must," but just thought I'd mention the Campy set because CAMPY. And C-Rec track hardly ever comes along. And if they were C-Rec high-flange, well, they'd probably cost close to what you could buy a Lemond Fillmore for.