"If you are near a college or university library, it will probably have back issues into the 1940s. A main city library (often the Carnegie Library) of a large city should have similar holdings."
I ran across old Consumer Reports microfilm archives in one college library. In fact, there were many old magazines, going to 1940 and earlier. You don't necessarily need to be a student, either--all college libraries I've seen allow people to use books and magazines in library, and will sell library cards to allow checkout. (These cards won't be cheap, but for someone doing heavy research, they'll be worth it.)
A public library might also have older magazines--although I've noticed many public libraries limit magazines to, say, the last 10 years. Still, it never hurts to check.
And yes, microfilm is a pain...but when it's a choice between no archive and microfilm, I'll take microfilm.[this post was last edited: 6/10/2010-02:33]