I use Itoya art profolios, they are the only thing that I have found that allows for (relatively) easy viewing.
http://www.misterart.com/g2200/Itoya...splay-Book.htm
I'm sure they can be found in numerous locations, but I've been happy with this website.
Frank - you and I should exchange info on the the M113 and M114 issues, I'm betting that between the two of us we have the vast majority of both issues and the (nearly infinite?) variations.
Doug