I guess you're right about the very early Okeh stuff on UK Columbia 78's and 45's, I probably wouldn't want to bother collecting them. Having a list of what Okeh recordings did get a UK release would be good to know though. For instance, didn't know about that other Johnnie Ray 78.
As for the Chuck Willis Ep, I think it's on my list, can't check, in London, but I can't remember ever having seen one. Is there a scan of it anywhere?
Btw Tony (& Gene), thanks for all this info, chuffed to find others even remotely interested in this kind of stuff.