Good afternoon. This is in all likelihood a hand drawn Roman style, so it will need to be matched manually. By the 1940s there were only about a dozen different lettering styles available for reproducing letters in the industry, all in the form of physical letter sets–though some shops did create their own alphabets out of metal or wood as well.
If you’d like help matching the lettering, feel free to use the MLC inscription matching service: https://www.monumentletteringcenter.com/product/cemetery-inscription-matching-service/