Thanks for the replies, as a newbie to this forum, I appreciate it. I also don't know how to reply to your comments individually, so this will have to cover all of you.
I'll look in to the Syracuse University archives, and I know my grandmother gave a ton of my grandfather's work to the Grand Rapids, MI library, so I can look into that too. It's a drag having to purchase things on ebay, but even that has dried up for the last year or so.
As for Mitzi McCoy, my uncle (Kevin, the other strip's namesake) gave me its complete run, about 99 Sundays. He and I have talked about trying to publish a book, but I really wonder how much demand there would be, and figure it would be better to publish it on a website or a blog.