Maybe try contacting Hasbro themselves? With their recent trend in cracking down, they might yet support you. I'm not sure where else we can get anything official other than the list of websites from the above that other guys have mentioned. Best of luck, man. It makes me worried too. Ratbat is one of the few I really want but don't trust anyone enough to ever take the risk.

Hopefully Takara re-releases him at some point.