Haven't seen a scan of the library collection, but several Design of the Month plans from the MRN volumes can be found here:
http://www.spacemodeling.org/jimz/eirp.htm
And several MRN volumes can be downloaded here:
https://www.oldrocketplans.com/publications.htm
Scroll down to Estes/Model rocket News
Also John Pursley's website has a few volumes:
http://www.accur8.com/Estes_Library.html
Hopefully someone has the collection they can scan and post here.
Good luck.

EDIT: More volumes here:http://www.spacemodeling.org/jimz/mrn.htm

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I like the unusual, the off beat, the avant-garde. No 3/4 FNC for me!