T Shirt printing recommendations?

I'm going to be taking a couple of images from Bryan Talbot's Alice in Sunderland pages to produce a T shirt.
1 because I want a picture of a horrified Bryan saying 'Am I ever going to get paid for this?' on a T shirt
2 because other people have said they want one too 
3 because I hope it will give him a bit of publicity

Any recommendations for online T shirt printing? It needs to offer black T shirts in a range of sizes and do backprints as well as the front image. Ideally a UK and a US site so folks on both sides of the pond can avoid high postage charges, but if necessary I'll go for one of each. Thanks!