Electric tongue jack manual crank

Does anyone know where I can get the manual crank. After a not so fun camping trip our plug to the electric tongue jack broke off inside our tv. Removed that and used our crank to adjust tongue jack and get the heck out of there. I guess we left it sitting on the bumper. So now no motor for the tongue jack, (needs a new plug hopefully that's all) and the crank is gone. I have looked all over the internet and can't seem to find a replacement. It is a top wind and has an odd nut. It is round on all sides except one which is square. Looked and looked. We are not having fun...yet.