Bruce, just push the thing into your pond. It'll make the water level rise! Strip the damn thing and cut your losses. If you can get money from stripping it out, put it towards your new trail rig. Oh and save the hitch for me!
Are you asking where to get joints or asking who can replace them. If all you need is them replaced I'll take care of you. Might even be able to help you out with the electrical as well