I found these at my local hobby shop in the RC airplane section. They are meant to be servo connectors.
As you can see they are 3 pin, but with a jewelers saw or sharp Xacto knife...
They make great 2 pin and 1 pin connectors!!!
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Packaged one connector set per pack, they fit super tight and even come with the shrink tubing for the electrical solder connections. The best part is that they retail at my LHS for $1.60 each.
I'm using these for the battery pack connector on the multi-cell micro RC Dragster/Funny Car that I am building right now. And I will have another one made up for my stand-alone battery charger- so I can charge the battery pack.
Just thought this might help with some of your custom projects!
John