there was a thread i done the time i powder coated mine, it had all the bearing sizes and numbers in it, cant find it now )-:
but in my detailed files i used 2x 6204DU (20x47x14mm) on the front; 1x 6204DU (20x47x14mm), 1x 3204B.2RSR.TVH (or TNG on the factory one that came out) (20x47x20.6mm), 6305LU (62x25x17mm) on the rear.
i got the bearings in the local bearing shop for a lot cheaper than triumph, but be sure to get a decent make.
i also got new circlips and oil seals for the rims from triumph in case some got damaged coming out. oh and dont forget rim balancing weights.