I re-built it and it works!
After finding the electrolyzer cracked and empty. I decided to rebuild it. I went to Menards and bought a water filter housing for $12.00 and it worked great. In about 1 1/2 hours I had my existing plates installed in the new housing without having to modify it at all. I did not even have to drill a hole in it. I have it installed and drove about 40 miles with it today and it is not overheating and seems to work like a charm. I’m going to drive about 300 miles tomorrow. I’ll report on the mileage after I get back. I’ll post some picts of the whole system too.