This morning I had an idea. The code is now written and somewhat tested and appears to be production ready.
It’s a PHP class that theme developers can use to add Google Fonts to their theme, which defaults to using Google as the source, but allows the blogmaster to specify an alternate source just by adding a single line to their
That would cause
whatever.org to be used instead of
whatever.org would still have to understand the Google Fonts GET variables and have a mirror of the fonts, but it works.