My friend and i were only able to find a place that sells the seals with the dust boots. If you have the seals pictured on 944Online, we were unable to find these sold seperatley without the pistons. I am sure there is someplace that sells them, but we werent able to find one.
http://www.zeckhausen.com/Brembo/Consumables.htm#Rebuild
Again, you need to verify these are the right type of seals for your car. I think 9 out of 10 caliper sets ive seen from a 944 Turbo used the seal shown on 944 Online.
If you do happen to find a supplier for the other types of seals, i would appreciate if you post and let us know.
Good luck.
(Btw, i think paint comes out just as good as the powder coat..however it dosent stand up as well to brake cleaner).