30GB Zune screw replacement

I need a replacement screw for the bottom charging port of a first gen 30GB. From what I've gathered they're a 2.6mm #00 philips head, but I'm not familiar with screw nomenclature and I can't tell which ones online would be the right fit. Right now the bottom only has one screw in it, and I'd like to have both because I'm paranoid something will break. Any pointers in the right direction of where I can get a new one would be mighty helpful!