Shaymin, you are correct about the character order.
Miyamoto, the premium shirt is printed on a high quality American Apparel shirt. The standard is on a Gildan shirt made in Honduras. My prototype is the latter, and it seems fine -- typical kind of shirt you might get with a custom printing. The premium material is probably a bit softer, and I would guess the stitching might last longer. The shop will indeed ship to the UK and virtually anywhere else in the world (fees vary).
Ceric, this shop does have polo shirts available for printing, and I would like to add that kind of product when we have an appropriate design. Same for a back design -- it just didn't make sense this time.