Wo sells the two heater hose fittings in my cylinder head?

Hi All: I'll be soon rebuilding the cylinder head in my 1974 Duster slant six engine. The head is the stock, correct head with no modifications. I will at that time be replacing the two coolant fittings in the head: The first is the 1/2" fitting screwed into the top of the head that goes to the heater hose. The second is the fitting on the underside of the head that the small bypass hose from the water pump fits onto. Typically, both are pretty corroded and hard to get out, but since I'm renewing the head I want everything to be new - including these two fittings. Does anyone know where I can get a set? I'd prefer the ones that have a hex fitting for removal with a socket, but I believe the one that goes to the water pump is smooth all the way. Also, do you have any tips for getting them out of the head with minimum difficulty? Many thanks!

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