Also this may sound like a stupid question, and somewhat unrelated to the topic, but when using a Sega CD I'm assuming I can't have a Genny cart plugged in right? I've never used one of these beasts before so I'm just assuming that I just power on the Genesis with just a CD game inserted.

More on topic, I can't find any suitable replacements. I guess I'll have to go out tomorrow and buy an adapter. I heard a PSOne adapter would work, didn't fit. I heard NES would work, wrong I/O. Why can't everything electronic have universal AC adapters?