Snapped Emulsion Tube 1975 Dart

The tube in the photo above. (Main well tube/emulsion tube) It snapped where it meets the carb. Sadly Ive done some research as to its purpose, and availability. Its pretty important, and nobody sells replacements. They have to be taken from another carb, so Im just going to buy a whole new one :/
Whats this off of, whats your timeframe, and how much are you spending on a new one? I'm about to have a working 2 bbl come off a 77 318. You can have the thing if its the same.
"free" is cheap, but if you can buy a reman with a warranty for $50, may just be worth doing that.