I think it's a Gotoh 510. StewMac used to carry them, but Warmoth still does (probably AllParts too, but I don't have time for a search).
I haven't used one myself but have heard good things about them. TonePros adds their locking studs to the Gotoh and sells it for PRS guitars with the fixed intonation.
i put a simialr bridge on a strat, cant remember where i got it but its just like the prs mccarty bridge. it was like $50 or so, ill see if i can find it for ya
I think it might be a Tonepros I think i saw it in a Uk Guitar mag due out soon or something like that :?:I've got a stop tail one for my LP and I really like it, worth looking into they must have a site
It's actually a PRS bridge that they had for a while used to be on the Archtops and the Tremonti ... the closest I can think of like that is the Driskill one.