I ran across this thread while looking for ST key info for a Tiger owner looking for keys.
If anyone is still looking for specific RM/RL, ST, FS, FP, etc. keys, I have a large inventory of original used (some look new) keys. Lots of Union, Romac, L&F, Rootes, Strebor, Stronis and other English branded and numbered keys.
I can also cut new keys to code, not just create duplicates. I have a few OE blanks, most blanks I have are aftermarket. I also have a handful of ignition switch lock barrels that take an RM/RL key.
Just putting this out there, a few in this thread seem to be after specific keys.