Simplest to do is to put RA23/28 complete struts with hubs and calipers into the TA22 and then swap the rear slave cylinders to the RA23/28 ones. This brings the balance back and the pedal wont feel so soft.
The '23 onwards have a bigger sized hub and is the basis for most of the brake upgrades mentioned in this forum.
You may find that with good pads and a slotted rotor from RDA this is all you need to do.
I am slowly doing a search as Norbie suggests at the moment and you'll find a heap of ideas.
I will endeavour to do an article as I promised on a couple of my conversions.