Maybe teknik motorsport (near Sydney / wrong side of the world ) can help you, they offer different springs for the shock:
From their website: "S46PR1C1 P/N YA 817. It comes with an 80N spring. Ohlins have discontinued the stiffer springs so we have more make in 85,90 and 95N. They are still Yellow so everyone knows you have an Ohlins!" I do not know if the sell the springs without an Ohlins shock, but hey, you can ask them.

See here: http://teknikmotorsport.com.au/Featu...ackage-upgrade

Ciao
Solitario