If you get some teflon tape from the hardware store you can wrap it around the lens and just leave the spring out completely. This is a pretty common thing to do, as you focus the laser the spring will rub on the module and lens and dirty the lens and diode window.
If you are dead set on some springs though PM me an address and I'll mail a few to you.
Survival Laser sells springs for an axiz lens that mounts on the exterior of the lens rather than inside the module head. I use these for several of my lasers and they hold your focus setting better than the internal springs IMO :beer: