Found new site
I bought a gasket set for my Dart heater box. Everything fit good and instructions were good as well. Unfortunately, the sealer for the halves was missing. I called cuz I needed to put it back together in a hurry. Jim couldn't send me some quick enough so he refunded my money and told me how I could get some at the hardware store. I ended up using plummers putty which seems to have worked good. Doesn't harden up.
He said that he works full time and does this as a sideline, I hope he keeps it up cuz it seems like he is a good guy.