gimmeheadroom
Headphoneus Supremus
The ones from the ebay seller look very similar to some a member made and showed in this post https://www.head-fi.org/threads/hifiman-he6-se.886229/post-17000690For fun, here's a few shots of the various grille options.
Stock:
eBay (hifigrillman_6502):
Arctic Cables:
My own 3d printed one (did a crap job printing, but it was a nice learning experience and I like how they look):
eBay ones are definitely the most open, just from a materials POV. Mine are least open. I honestly haven't listened critically to them back-to-back to see if there's any noticeable difference in the sound. At a certain point, I'm mostly just looking at aesthetics for the aftermarket grille options.
I found a seller in California a while back but he doesn't ship outside the country. When I found the guy you mentioned on ebay just now, nothing is listed. This seems to happen a lot when they don't want to sell into a particular area, nothing shows up.
Anyway, nice set of grilles!