Well, after a little research... I havn't really been able to come up with much other than finding people using the same disks that you've already mentioned.

So which calipers should I be looking for exactly, if I want to buy a set? I did some looking and I can see two different combos using nxa forks (I think) but they are using slightly different calipers, or perhaps they are different revisions of the same model (no idea)

So what do you think I am looking at here? They all seem to be using different disks too...

http://homepage3.nifty.com/hiro_nsr/jpg/nsr/brake/nsr_br5.JPG

http://i55.tinypic.com/4rx661.jpg

http://farm3.static.flickr.com/2475/4038380918_a2a49fd7fd_o.jpg