If you have money in hand, and are quick, even in the springtime you can pick up a 99-02 SV for $3500 or less that should have:
SS Lines
Forks w/Springs & emulators
Penske Shock
Race bodywork/fairing stay
clipons/rearsets
pipe/jet kit
In reasonably good condition.
You need to read every ad that says SV650 on every board you can every day for about 2 months.
There are a fair numbe of bikes out there with 'springs and a 636' shock along with other not so valuable mods, along with really UGLY bodywork, evidence of 'an easy lowside' and other nicely cobbled together bits. These bikes will often be listed for the same $$ as a PROPERLY set-up track/race bike. Keep walking, the suspension mods you want (penske + springs/emulators) cost around 1200 new and 2/3d of that used.
As mentioned before, SCOUR the race forums: WERA, CMRS, CRA and the NESBA forum as well. Be ready to travel and POUNCE on that nice clean, maintained and well equiped bike.
I've been watching the classifieds on the forums for a couple of years, and while they bikes might go for a little more in the spring time, the main thing is that they sell lots faster.
Good luck!