You need a GSXR 1000 shock from a K1 GSXR 1000 onwards, makes a big diffrence and not expensive if you find a good one on Ebay.
How to fit here;
http://people.tamu.edu/~redaggie03/S...ar%20Shock.htm
I have Hagon front progressive springs and they are top and make a big diffrence to the bike especially if you have a better shock....
I'm now going the whole hog and transplanting a GSXR front end, just waiting for the bits to arrive