Do you know the dimensions of this pot? Rough estimate would be fine.that's just a pot for dipping. this is the Baldor drip pot on my grinder with brass valve and copper drip pipe.
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I was going to suggest maybe making your own either from a welded up pipe, big pipe fittings, or maybe cast one from aluminum or pot metal. Lost foam casting might be an option. Might be some metal cup available that could have the valve and tube added to it. The mounting hole might just be a tube or something welded/soldered/epoxied on either inside or outside the cup.
The new photos came as I was typing this. An idea of the size would still be nice but those pictures should be enough to figure it out especially if you had the grinder that you want it to fit on. I don't have that type of grinder but I'm tempted to try making the pot just as a nicer dipping pot than the plastic jar I have been using.