Sorry to be so late getting to this subject but , and you may all already know this, Boutje is up and running with a pile of different sites, some of which might not please some of you. However, G.A, material is here:-
https://goldenagecomicheroes.wordpress.com/If you go to the list near the bottom of the page, you'll find his other pages, some with categorised American old comics and some with other comics and subjects.
A lot of what's on there comes from DCM, CB+ and other not necessarily pd sites, so be aware of what you will find if that sort of thing concerns you.