Hip Hop Skid Bikes / Hipster Sleds / HHSB

Pretty sure they're these http://www.store.superbbicycle.com/product/superb-sprint-matte-black-track-fork
Edit: seems sold out. Factory five and colossi should also have these. also for what it's worth, at the time I asked (about a year ago) Orlowski offered custom steel forks for 100Euros, which seems like a very reasonable price.

Thanks :-)