You can prolly get the springs and fiddle with the fork oil but dunno about doing the gold valves on the SS/CR forks. Depending on the type of non-adjustible forks you have (Showa or Marzocchi), it may or may not be able to be re-valved. If you can do it, Strati's got the best bang for the buck.

For a bit more $$$, you could get a set of used fully adustible Showas that come OEM on the SS/SP bikes & do the gold valves/springs.

The difference will be night and day!