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The vector files used to be on the GitHub. WhyEssEff has the source files for emoji.
source comic: https://i.imgur.com/VmVMABH.jpg
Is the 401x550px raster emoji not enough? How big do you want?
https://www.hexbear.net/pictrs/image/bd0e03e9-ee78-47b7-9296-af78f9158ce9.png