Does anyone know where the best place is to get some one off jerseys made/printed. I am a freelance designer and would like to get some tops designed to promote my business (maybe 2-3)

A number of people I know have looked into this. The minimum run is usually 10-20 to amke them cost effective. Would be interested to know of anywhere that is prepared to do less though.

http://www.designmyjersey.com/offers.html

Not cheap, but the only option I've ever found.