2011 - 18 years = 1993.
Only thing I can think of is the "CrashCart Debacle" out of 2XS (1992)
Otherwise, 1993 +/- 1 year, it would be in one (or more) of the following:
1992
Novels
N04 2XS $4.50 Findley, Nigel D.
N05 Changeling $4.50 Kubasik, Chris
N06 Never trust an elf $4.50 Charrette, Robert N.
N07 Into the Shadows $4.99 Weisman, Jordan K.
N08 Streets of blood $4.99 Sargent, Carl
7100s
7109 Shadowbeat $15.00 Hume, Paul R.
7110 Shadowtech $15.00 Wu, Karl
7200s
7204 Germany Sourcebook $18.00 Immig/Romer
7208 The Neo-Anarchists' Guide to Real Life $15.00 Findley, Nigel D.
7300s
7309 Imago $8.00 Sargent, Carl
7312 One Stage Before $9.00 Findley, Nigel D.
7900s
7900 Shadowrun Main Book 2nd Ed. HB $30.00 Staff
7901 Shadowrun Main Book 2nd Ed. SB $25.00 Staff
7902 Shadowrun Game Screen 2nd Ed. $12.00 Dowd, Tom
7903 The Grimoire 2nd Ed. $15.00 Hume, Paul R.
1993
Novels
N09 Shadowplay $4.99 Findley, Nigel D.
N10 Nights Pawn $4.99 Dowd, Tom
N11 Striper Assassin $4.99 Smith, Nyx
7100s
7112 Paranormal Animals of Europe $18.00 Sargent, Carl
7113 Corporate Shadowfiles $18.00 Findley, Nigel D.
7200s
7210 Tir Tairngire $18.00 Findley, Nigel D.
7211 Tir Na nOg $18.00 Sargent/Gascoigne
7300s
7313 Dark Angel $8.00 Kane, Thomas
7314 A Killing Glare $8.00 Prosperi, Louis J.
7315 Celtic Double-Cross $8.00 Sargent/Gascoigne
1994
Novels
N12 Lone Wolf $4.99 Findley, Nigel D.
N13 Fade to Black $4.99 Smith, Nyx
N14 Nosferatu $4.99 Sargent, Carl
N15 Burning Bright $5.99 Dowd, Tom
7100s
7104 Street Samurai Catalog $12.00 Dowd, Tom
7114 Fields of Fire $15.00 Dowd, Tom
7115 Lone Star Sourcebook $18.00 Findley, Nigel D.
7116 Prime Runners $18.00 Sargent/Gasgione
7117 Bug City $18.00 Staff
7200s
7204 Germany Sourcebook $18.00 Immig/Romer
7212 Denver Boxed Set $25.00 Findley, Nigel D.
7300s
7316 Eye Witness $10.00 Nystul, Mike
7317 Paradise Lost $10.00 Wong/Findley
7318 Divided Assets $10.00 Dowd, Tom
7319 Double Exposure $10.00 Cain/Findley
7320 Harlequin's Back $15.00 Staff
7400s
7401 Sprawl Maps $15.00 Staff