I can't think of anything in Scotland, since unhappy ground accidents wrote off the two Prestwick Chipmunks.
Down south: West London Aero Club at White Waltham and Western Air at Thruxton are two that I would have time for - but there are certainly others. The Tiger Club is well regarded, although I've never used them myself.
If you specifically want a Super Cub, WLAC have a couple - but so do other people, and it's not the only tailwheel trainer out there.
G