Kraig, Icenutz is right on if all you lost were the inside parts that fell out when the knurled ring unscrewed. Four parts would need replacement and they are pretty standard–the fuse, a metal cap to go over the fuse, the knurled ring, and a spring. I have two 12v plugs side by side and the parts are interchangeable–one is my H2o/hunt power supply. You probably have one in your junk drawer right now–I had 4 of them.