Todd Messinger of Pelican Park in Oregon was a MESAC member. You can see his posts here in the 1/24 forum, and most recently in the SCT 5 forum in the "Scale Driver's" thread - with pics and links to the Pelican Park web site.
Also, the original Model Car & Science articles, by Robert Schliecher, about MESAC, have been scanned and are available on the www.VSRNonline.com website, in the "Search Index of Magazine Articles", under "Track Plans" at the bottom:
MESAC Article & Track Plans - Model Car & Science
Best bet is to save the images to your hard drive, and then open and print them in an image editor program - since MSIE tends to shrink them to fit the window.