Daytona Rear Shock

I’ve just found that the rebound adjuster on my 2001 Daytona 955 rear shock is seized up, so I was wondering if anyone has had one of these shocks rebuilt?
I’ve thought about getting an aftermarket shock but would ideally like to keep the bike original so a rebuild would be good if at all possible.
Has anyone any experience of this, any recommendations of where to get it done and ball park costs?

 

It’s only done about 17k miles so should be good with a refresh.
It’s got compression and rebound damping so it’s not bad spec and is in decent nick really. I looked at Hagon, Nitron etc and it’s £450+ for a new one of similar spec.