Seems the New York Library has done a bit of scanning but the years for 1933~38 are not full scans. I don't know if that means they are still working on them, I hope so. Boy's Life has some Empire ads but once you get into the 40s they only Ad is their Lamp they made - I think
@txlabman has one of those. I sent in a query about their scans for the years I am looking but they might not be helpful since I am in Texas (thus no Library Card).
I guess I should add that full Empire catalog here too.