I second the recommendation of Forbidden Planet for you UK people (like myself). They're pretty good there - can get almost anything! I found some old RGB comics in there a while back. The store in London has moved from Tottenham Court Road, can't remember for the life of me where it is now, but my mate has been there and said the new premises are great.
I'm not usually a big fan of comics but this new one looks great. The guys look like a great cross between their movie selves and their film selves. Especially glad they did something with Ray - my bro was never entirely convinced as a kid that the guy in RGB was meant to be the same guy as in the movie!