Then and Now Automotive in the Boston area. They have reproduced (in the USA, and decades ago) many of the different fuel pump and water pump castings. Not that a new casting is always available, but if it is, nice to know these folks will have quality ones of most of the common castings.

If I couldn't rebuild it myself, this is where it would go.

Jon.

Good carburetion is fuelish hot air
The most expensive carburetor is the wrong one you attempt to modify.
If you truly believe "one size fits all," try walking a mile in your spouse's shoes!
The Carburetor Shop