This may be useful to you. The following is a list of some issues/adventures in the level range you are looking for. Issue 100 (The Lich Queen's Beloved - Githyanki special) is exquisite.
EDIT: this list from the sortable index at :
http://intwischa.com/dungeon/
from this site you can also see very brief descriptions of each adventure
84
Harrowing, The / 15/ Forgotten Realms D&D 3.0
87
Glacier Season /15/Generic D&D 3.0
91
Rock and the Hard Place, The /16/ Generic D&D 3.0
92
Razing of Redshore, The /20/ Generic D&D 3.0
92
Interlopers of Ruun-Khazai /13/ Generic D&D 3.0
94
Worms in the Exchequery /15/ Generic D&D 3.0
96
Beyond the Light of Reason /13/ Greyhawk D&D 3.0
97
Heart of the Iron God /13/ Greyhawk D&D 3.0
97
Demonblade / 16/ Generic D&D 3.0
99
Quadripartite / 14/ Greyhawk D&D 3.0
100
Lich-Queen's Beloved, The /18/ Generic D&D 3.5
101
Prison of the Firebringer /13 / Forgotten Realms D&D 3.5
111
Strike on the Rabid Dawn /15/ Greyhawk D&D 3.5
111
Lords of Oblivion /13/ Generic D&D 3.5
113
Foundation of Flame /15/ Generic D&D 3.5
114
Thirteen Cages /16/ Generic D&D 3.5
115
Strike on Shatterhorn /18/ Generic D&D 3.5
116
Asylum /19/ Generic D&D 3.5
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edit: adding more- excuse the formatting, this is cutting and pasting and I don't have the time to maximize!
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117
Winding Way, The
14 Generic D&D 3.5
118
Throne of Iuz
14 Greyhawk D&D 3.5
119
Tomb of Aknar Ratalla
14 Generic D&D 3.5
120
Lost Temple of Demogorgon
14 Greyhawk D&D 3.5
121
Secrets of the Arch Wood
13 Forgotten Realms D&D 3.5
122
Root of Evil
18 Generic D&D 3.5
123
Amarantha Agenda, The
13 Generic D&D 3.5
124
Maure Castle: Chambers of Antiquities
16 Greyhawk D&D 3.5
125
Seekers of the Silver Forge
15 Generic D&D 3.5
126
Blood of Malar
13 Forgotten Realms D&D 3.5
127
Dungeon of the Crypt
13 Forgotten Realms D&D 3.5
128
The Fireplace Level
14 Forgotten Realms D&D 3.5
129
The Twisted Run
17 Forgotten Realms D&D 3.5
130
The Spire of Long Shadows
13 Generic D&D 3.5
131
The Prince of Redhand
15 Generic D&D 3.5
132
The Library of Last Resort
16 Generic D&D 3.5
133
Kings of the Rift
18 Generic D&D 3.5
134
Into the Wormcrawl Fissure
19 Generic D&D 3.5
135
Dawn of a New Age
20 Generic D&D 3.5
136
Gates of Oblivion
18 Generic D&D 3.5
137
Man Forever
16 Forgotten Realms D&D 3.5
138
The Mud Sorcerer's Tomb
14 Generic D&D 3.5
139
Maure Castle: The Greater Halls
17 Generic D&D 3.5
140
Heart of Hellfire Mountain
20 Generic D&D 3.5
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