i have an 02 GSXR 600 as well. I put a 3"drop on it. You dont really need the swing arm extenders. My 600 dyno'd 109 hp at the back wheel and it will NOT wheelie with the drop. It just spins the tire when i launch. In my opinion you dont need the extenders.
But if you really want them I will give you a good ass deal on my brand new ones