I'd suggest asking/trying Mike @ "Collector's Cards and Games".
I've known him personally, for years...and I know that other site-users here have dealt w/ him as well.
He deals in *TONS* of retro games, consoles, handhelds, accessories, etc.
His prices aren't bad, and even more importantly, he does not mis-represent the conditions of anything that he sells.
I'd say that you should give him a try...anything he *doesn't* have - he will either be able to get, or at least, direct you to whatever you're looking for.