Portable air compressor plugs into cigarette lighter

They used to make one and it was sold at "Radio Shack" or "The Source" in Canada. They are male on one end and female on the other with maybe 20 feet of wire. If you can not find one, you should be able to get the ends or a short one and add longer wire in the middle. Just be carefull to not get too long and check to make sure the wires are not getting hot while in use.