These good guys too:
http://www.ducati-kaemna.de/cms_en/k...el&artikel=234 Only available in gold at the moment apparently - EUR 139
Calipers to look for are P34/4 and yes I've used a pair from an RSV-R on my ST4s, work very well but you might need to factor in new hoses if the banjo mounting point is different to your existing - P4's mount to the side:
