They do but I'm not forking out $1300. In my quest, I am learning Yanmar uses that engine and radiator set in a number of JD and Yanmar and other brands and models. But when you look up those other brands and models, they all steer you to a newer aluminum upgrade that doesn't appear anything like the original. The connecting ports are located differently. All of the related body/frame pieces that are welded to the radiator frame are missing. The pass-thru holes underneath are also missing but are needed to pass the wiring and fuel lines to the front. Priced under $300, it is reasonable but not willing to take that chance that it might not work or fit properly.
I located a radiator shop in West Plains (about an hour away) so will try to get it in there. The guy never answers his phone so tomorrow will run over there and hope that he is around. We need to do some shopping anyway and also that's where the closest JD dealer is so will swing in there and load up on a thermostat, filters, belts, hoses and anything else I can replace while I have it disassembled.
If that doesn't materialize into anything, I'll just add more JB Weld, do what I can, reinstall it and hope for the best. I'll be able to dig in deeper this winter but for now, I need to get it working and I could live with a slow leak for the time being. I do believe that now that air can get through there (with the cleaned out screen), it won't be running as hot and boiling away what it has like was occurring before.