We tried Matt's machine shop...but found no longer have any S&S spares...we await with interest to see whether Richard Thorne can get any from Morgan to deal with a slight weep that came to light during the Treffen run a few weeks ago (car is due in for check/MoT next week). If that fails, we may be into exploring how to make them.
We likely have the orginal (10+ yr old type) that have not been disturbed...