Thermostat Housing

I have a 360 magnum in a Durango, I fought and fought with a leaky thermostat on that damn thing, changed the water neck a couple times, was about to change the intake thinking it might be warped, finally bought a new water neck and hasn't leaked since, been about 8 months or so. I hate that I can't find anything but a stamped steel one for a magnum, being as tall as they are