Joolz should still have my old ones as I upgraded to Nitron dampers last summer. I'll give him a ring tomorrow and get back to you. Mail me a contact number off-line and I'll give you a ring.
If no luck with joolz, I've also got a pair you can have in the back of my garage, having recently uprated. Their yours if you sort out the postage or collect. From August '97 4.2 approx. 27K.