2011 425 lb. sprung loaded ti titanium shock spring 9.5" x 3"

Sprung loaded ti spring, been tested by J-TECH at 425 lb. which is too soft for me, a trade for a 475/500 lb. spring would be good?

http://www.sprung-loaded.com/

For rockshox shocks, came off a 2011 vivid r2c

Very good condition, just one small chip that is barley noticeable

Thanks