http://www.privategeetar.com/INTRO.htm stock OFR's. I haven't dealt with them though, I have no idea if they're any good or not.
I recently ordered a chrome Gotoh trem (the one at £110) from
www.wdmusicproducts.co.uk . I haven't fitted it yet (damn studs are too big!), but the first impressions look excellent. It appears to be basically an Ibanez Edge, but for the same size cavity as an OFR (the edge is bigger, and won't fit in an OFR-sized cavity). Locking studs, fine tuners out of the way of your picking hand, lower profile (but still original-style), adjustable arm height and torque. Neither the OFR or Schaller have any of these features (apart from arm torque). the locking nut is £20 extra, but that's still £10-£15 cheaper than an OFR, and about £30 less than the cheapest I could see a Schaller for. And to be honest, going by the features (assuming it doesn't suck in use, lol), I'd prefer the Gotoh one.
Of course, since I haven't tried it, it might suck, but I've heard from reliable sources that it's awesome.
EDIT: the gotoh one also has rounded saddles to make palm muting a lot comfier- i don't think the edge has that.