I'm just bumping this up the list 'cause I'm in the market for a GPR or Ohlins steering stabilizer also. So, I'm interested in the replies you get.
the GPR you're looking at is the one that attaches to your triple clamp center bolt? I'm having a hard time finding many Ohlins prices but so far they are quite expensive ... ~$500.
I've found some GPR's for around ~$380 give or take a few 10's.
regards