Get in touch with Rick at Cogent Dynamics...
He is a very clever guy with years of experience..
I've seen him rebuild "non rebuildable" shocks before.
He will give you good advice and service at more than fair prices.
IIRC, Race Tech offers a Gold Valve for that shock.
If so, it must be rebuildable.
BTW, Cogent Dynamics was just named the largest Race Tech center in the world.
Rick has both a "shock clock" for real world, on bike, testing and a new shock dyno
for in house testing of shocks and forks.
Tell him you're a member here...
Hank