You, my friend, have great taste in comics! :D
I'm a HUGE fan of THE CROW (I own two original sketches by Jim O'Barr as well as some other uber-rare CROW merchandise) and I also own an original page of FROM HELL!!! :D
(The page where Gull meets Netley for the first time and is getting into the carriage...)
As for a good online store, have you checked-out
www.khepri.com/?
I *think* they ship to the UK...
Lemme know! :D
Best wishes,
Aaron Weisbrod