Hello, this is believed to be a custom font designed by the since closed down EC Crooks Memorial Company out of Carthage, New York. It is loosely based on a script alphabet in an old Vermont Marble Company lettering book, and is similar (though there are many obvious differences) to a font in Cochran’s Monumental Designer software, named “Roman Modified Script”, which is also based on the same script alphabet from the Vermont Marble Company.
Unfortunately there is currently nowhere to purchase the font, though the Monument Lettering Center has been collecting references for several years and will likely end up creating one.
In the meantime, if you would like help matching it for a date of death, feel free to utilize the Inscription Matching Service: https://www.monumentletteringcenter.com/product/cemetery-inscription-matching-service/