What i would do is take a trip to Good-Will, Value Village or some other second hand store and look around the electronics section for a 12v power adapter. I can usually find them for about 2 bucks. If you can't find one there I would go over to Radio Shack and grab one. Then all you do is take the wire that comes out of it, cut off the plug at the end, and wire the red wire to the wire that has a white stripe on it. If the wire isnt red or has no stripe look for something distinguishing, this is usually the positive. If you want to go all out you could take your adaptor in to radio shack and get the female connector that fits it and wire that in so you can plug your fan in without moving the adaptor or fan. Well hope that helps