I ordered one off ebay.co.uk.. there great,- you have access to every port apart from the memory stick area. However, there only £4 so what can you expect, i think they must be on the .COM version etc. They are really worth the investment- another bad point it wont fit in the black sleeve and there's not screen protector attached, still you don't have to worry about body scratches and whats more its suppliers from the UK and wales so no good not Turing up late!
Just thought I'd say..
ebay.co.uk- there in the PSP and then cases/accessories section.