John,
Gee, only 15 years?
I don't keep those magazines like I used to but the Dec. or Jan. issue always has an index of the previous year. That way, maybe you'd only have to look through a 12th of the stacks.
I will keep my eyes peeled because sometimes I amaze myself at the stuff I have saved or hung on to that comes in handy down the road.
Good luck,
Lou

If it weren't for the wonder of electricity, you'd be reading this post by candle light!