I got one!
Having just found and read the entire of the thread, I rang Milletts and Blacks in Gloucester, then Milletts in Cheltenham - none of whom had any. Finally I tried Blacks in Cheltenham and they had some!
I just did a round trip of just under and hour and half to go and get one and am now insanely excited. Little things eh?!
The guy there didn't really know what it was about either, but the piece of paper he was literally just reading about it said that there would be 2 further deliveries at some stage.