1971 198 slant six Carb

Looking at every website Napa AutoZone everyone that sells parts and I can’t find an exact replacement single barrel carburetor for my car. Napa doesn’t have them listed or the rubber gasket as being available . eBay doesn’t show any new ones only old garbage . What can I buy as an exact replacement , linkage , bolts hoses everything. Anyone know what is out there ? If answer is nothing let me know that as well .
Which carburetor is it? If you're not sure, can you post a good picture?