Perusing The Asylum, Vol. 1 No. 1 (Summer 1980) and subsequent issues, along with Joel Orosz's article "The Numismatic Bibliomania Society, 1980-1997 - AHistory of Seventeen Years in Fifteen Volumes" published in 1998 (I think), I conclude the following members were among the "dozen or so" founders (but none exceptthe first two are an absolute certainty):

This list can only be confirmed by reaching out to Messrs Kolbe & Adams whose first hand recollection of the event will be more reliable than this hypothetical list gleaned fromthe pages of The Asylum.

To read the earlier E-Sylum article, see:
LIST OF NBS FOUNDING MEMBERS SOUGHT (http://www.coinbooks.org/v21/esylum_v21n39a02.html)