Thanks for the advise Brian. I just might try them. My wanted advert in Fishtail didn’t work though.
Thanks also Barrie but it’s a Velocette or John Tickle item or nothing. The single leading shoe (with air scoop modification and racing linings) was used when it was raced in the TT and British Grand Prix in the 70’s and 80’s. It works well and will be retained unless I get a genuine Velocette or John Tickle tls brake.