Yep, there are lots of front glasses but no inner glass for MGOW. I have a friend who has the black version cabinet who is missing the inner backglass and is buying a complete machine that he will be parting out to obtain the inner glass. So that makes for another surplus front glass.
Perhaps you will have better success in finding the inner glass. Maybe somebody will make a translite version to add to a clear glass that will solve the problem for many folks.