Yeah, the ebay seller "Sirius" has a monopoly. He noticed the demand and decided to fill it. He found a guy to make them for him and I think he sells quite a few now. I rode down to his shop and bought enough to do my 400F seat. They look great (or at least good enough to pass for factory from over a foot away.)
I think in the six or seven months I looked on ebay for the pins, before Sirius got into it, I saw 1 set of about ten studs come up once. Someone paid about 50 US bucks for those ones.