Look for a used Elke, Ohlins or Penske shock in the various forums.
They come up all the time and you got to move fast cause they don't stay there long.
Here is the line of thought behind this strategy. You say you can't afford it. Fair enough. Buy a used one, get it reconditioned, run it on your bike for several years and sell it separately when you sell the bike for the same price you paid for it. Keep your stock SV shock, it takes less than a half hour to swap out a shock.
There is a reason those mooks above recommend a Penske, Ohlins or Elke shock instead of a gixxer unit. I have never met anyone who rode one of those shocks go to some OEM kludge after riding one.
You may also want to spend a little time in the suspension forum and read Peter Kates diatribe on this subject.
http://www.nestreetriders.com/forum/...swap-myth.html
Stealing from his sig ... "If you can't afford to do it right the first time, how will you afford to do it a second time?"
You may also want to check out Spears Enterprises, they offer a race tuned emulator and rear shock by Ricor. I took off my AK20's and Penske triple and trying the Ricor shock and emulators out here in the Smokies and I am quite impressed for the money they cost. I got my stuff from Ricor directly and it is street tuned. Spears Enterprises does the race tuned Ricor stuff. (I got 3 different front/rear suspension setups and two sets of wheels with different tire types on them.)
Only bitch I have so far about the Ricor emulators is the oil check ring around the emulator swells after you take it out of immersed oil and you have to file it down to make it slip easily back into the slider tubes. It functions the same as a piston ring. The swelling causes stiction in the forks. So you take a fine mill file and file off a sixteenth of an inch at a bevel. Problem solved.
There are plenty of options out there that are purpose built especially for the SV.