My friend just bought a lovely syrian from Towyvale hamstery in Llandovery but they dont have babies that often.
They also (very kindly) picked up a couple of roborovskis for me from a hamster show. May be a bit for for you though.
Towy Vale Hamstery
You could always try the p@h adoption section as rescuing is a kind thing to do or even gumtree, etc
Good luck in your search. I love the long haired syrians. (I have a white fluffer with red eyes).