I don't know of any sites, but I went to a sports store called The Sports Authority and they gave me a magazine we could customize our jerseys. I did that once, but I usually go to our local mall and they have a place where they order the jersey's and you can either draw your own design or use logos. it wasn't to bad of a price either as long as you bought like 12 of them. You can usually cut a deal as well, because you can bargain and say well if you put your logo on the jersey as well, they can knock down the price...