I have searched & found a few, this one is the best:

Kitbag.com

Some others:

http://www.eurosoccerstore.com/
http://www.manutdfcshop.com/
http://www.liverpoolfcmegastore.com/
http://www.arsenalfcstore.com/
http://www.spursfcshop.com/
http://www.chelseafcstore.com/
http://www.rangers.uk.com/
www.celticfcstore.com