It's TransfigUration and I have Proteus, and luvverly it is too! Graham Tricker (G.T.Audio of Tron fame) has one too, and swears by it. I've not seen any mention of one for sale on any of the 3 forums (which includes some dealers) since I bought mine 4 1/2 years ago (didn't realise it had been so long!) That doesn't mean to say that other dealers haven't advertised one though.
I think that any N.O.S. would have been sold off by now, and used may be the only route to acquiring one. Although G.T. says that the new ZXY comes close (there's a recent/current thread here somewhere), it's close; not better. An utterly transparent yet dynamic cart. with a lovely stylus profile tip (never picks up stuff, though my records are RCM cleaned).