Best place to find HO scale cars/ trucks and accessories - Model Railroader Magazine

One thing to consider about the 1947 timeframe is that people who had cars during WWII could not easily get repair parts or replacement vehicles depending on their ration status. Sale of tires and many items were restricted due to production needs for the war effort. Cars for general use went out of production sometime around 1942; cars produced for military use were based on 1941/42 designs, and many of these designs were used for 1946 production when sales to the general public resumed.  After rationing was recinded around 1946, many people bought new cars to replace the ones that were worn out. Photos from around 1950 show very few 1930s cars. Times were good and a lot of people could afford to buy new every couple of years.

Sylvan Scale has a some cars from the post war timeframe, notibly 1946 Chevy Aerosedan and Fleetline with fender skirts and winshield visor, 1946 Chevy Stylemaster, 1949-51 Studebaker pickup and other trucks,1941-47 Chevy/GMC pickups, and 1951 Studebaker coupes, sedan and convertible, 1941 Nash, 1941 Willis coupe and pickup, 1946-49 Plymouth. They have a number of 1930s-50 cars. They are resin kits with driver figure

Stoney Mountain Classic Castings is back in business with cars and trucks from mid 30s to early 50s. They have 1947 Buick Roadmaster, convertible and woody wagon, 1950 Buick sedan and wagon, 1947 Chevy Aerosedan, 1950/51 Nash Ambasador, 1950 Chrey Suburban/Panel Delivrery, 1950 Packard sedan and wagon, 1949 Mercury woody wagon, 1947 Frazer, 1948 Packard, 1941 Ford Woody wagon, and more

Alloy Forms has a number of cast metal car kits from early 40s to late 50s. Ford, Mercury, Chevy, Cadillac, Hudson, Buick, DeSoto.