I think I found the service manual at https://www.manualslib.com/manual/1252205/Epson-Artisan-810.html?page=11#manual
You could download it all or try to find the page where it shows if there is a piece part available. What I learned as being a factory auth repair center is often you can only get assemblies.
Today, we have Ebay which I have bought entire printers for a part or to use to put my good parts into.
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