Helicopter John is a friend of mine and related his disaster to me in some detail. It was about three years ago as I recall but he told me at the time that Renishaw has an exchange program for the probes. The exchange price at the time was $900.00. I suggest you call Renishaw directly. I seriously doubt that your local HFO will be of any help with the exchange program.
I sent John a couple of emails in the last few weeks with no response, frankly, I'm a little worried about him.