http://www.bagofholding.co.uk/
This is the store that ran the one day Blood Bowl tournament that Gary, Mike and myself went to, in Bournemouth.
I've since ordered some bits and pieces from them, and the service has been great.
Check them out, and if there's something you want that isn't in their store (and you're not desperate for immediately) drop them a line, as they might be able to get it.