Diesel Bombers - dodge ram diesel intake manifold relay

I live in washington and am having a hard time getting a new gride heater relay. It was draining my battery so a little investigation showed my relays were stuck and closeing the circut. I tried to order another but was told it was on back order and to top it off chrys. makes just a few at a time.

I took the relays apart and managed to get them working again, and I installed two vlotage guages in the cab and hooked them up to my manifold heater. In a way Ii wish i had done it a long time ago because now I know the voltage on each side if the heater and will notice any voltage when the key is turned off avoiding an unexpected dead battery while I wait for parts. I don't want to go to the junk yard.

Anyone know where you can buy the parts that are in stock!