This is a tough one. I'm chasing a few matchbooks myself in cases where a player doesn't have a card (Roy Lumpkin for example) and I can never find much sales data. Sometimes they seem to sell in lots. I searched for the Nagurski on several auction sites - Heritage, REA, LOTG, Goodwin, Sterling. All of these sites provide historical data. For Nagurski, I only saw his chicle card, dixie lid, a signed check (Heritage actually had several signed items) - no luck on the matchbook. I'll have to defer to someone who collects these, but they don't seem to come up often.....
In terms of the GridIron Greats article, I think the article may have been in issue #1. I'm not sure because I have an author's copy. Here is the link:
http://gridirongreatsmagazine.com/backissues1-22.html