If you are talking about the runner/rail that the bike wheel sits in then I have a pair of Fiamma ones. I think complete with straps and also the brackets that fit to the cross rail.
Where are you?
It is easier for me to collect from you than go to Reading for PVC’s So if I can take up your offer if I may. Thanks to both for your offers.
I can be in Plymouth week commencing 21st September if that is ok?
Email me if you wish firstname.lastname@example.org