Where can I buy live feeder rats near Portland, Or?

I recently adopted a ball python that will only eat live food. The previous owner let him fast for over 2 months and he still wouldn't eat frozen thawed. I am having a hard time finding live rats, so I am wondering where to get them that is either nearby, or cheap to buy/ship. Yes I already know the risk of feeding live, but if he won't eat frozen I can't really help that.