1975 Dodge Dart Single Barrel Carburetor (225 Slant 6 motor)

Looking for the Holley 1945 R7018 Single Barrel Carburetor off of the 1975 Dodge Dart Swinger with the 225 Slant 6 motor. Automatic engine.
Broke the Main well tube when trying to rebuild it, so need a new carb since that piece is impossible to find outside of a carburetor.