This cross reference looks good.
Corrected URL:
https://www.autolite.com/docs/defaul...ref_0311_0.pdf
I hit control F on webpage and typed 3076 in search box. It crosses 49 different manufacture's plugs.
I will bet that you could cross W18 and others to find many other machines that use similar plugs.
Also in recent years Champion changed their numbering system.
Example W18 is called 518