Definitely not THE definite answer, but I looked into this last summer and the problem is that most Brembo calipers are not with the 108mm Japanese bolt spacing that Triumph uses, but the Italo/Euro one.
The lowest spec 108mm Brembo calipers I could find were 700+ euros A PIECE. This is pretty much where I decided to can the whole idea.
Caliper x 2 + Mastercyl + lines + misc spacers and supplies
= 1400 + 250 + 100 + 50
= 1800 eur minimum
= too freaking much for brakes.
Discacciati does cheaper replacement calipers in correct spacing, but I have never used them so cannot say anything about quality.
Edit. Oh, forgot to answer your question: yes, there are direct bolt on replacements. You just need a deep wallet, calipers with correct bolt spacing and suitable caliper spacers. Any Brembo shop should be able to sell you the spacers too. www.carpimoto.com
is one if you want to order online.
Edit. Disclaimer: as I have not done the actual replacement, don't come crying back if something with the above specs does not fit after you have bought the stuff...
[ This message was edited by: Martin_R on 2007-02-08 12:02 ]