If you're new to EQ, or returning after a long absence, perhaps there are some quick things we can help you with, if your searches are more of a generic nature. If you're looking for something very old and specific, then maybe not so much :)
For general armor for a newbie/returnee, just look for "defiant" armor, available in ranks all the way up to the 70s (elegant). There are pieces that drop for all 8 visible slots, pieces available in PoK from an NPC right next to the Loyalty vendor (jewelry, so rings, earrings, face and neck). There are also drops for primary/secondary/range/charm. That just leaves shoulders, waist, and back. Those three slots are available from quests given by Franklin Teek in PoK (the daily hot zone quest). These three pieces don't have "defiant" in the name, but "adept" for silk/leather wearers, and "combatant" for plate/chain.
Once you hit 80, there's lots of good gear you can get from the HoT expansion, then VoA at 85, and RoF at 92.
Tat
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Tatanka Wolfdancer, 115 Wood Elf Druid, 9 x 300+ Master Artisan, 7 maxed trophies (dang research! :)
Michone, 115 Troll Shadowknight
Anaceup Mysleeves, 115 Erudite Mage, 2 x 300 Master Artisan
Snookims Whinslow, 112 Erudite Enchanter, 2 x 300 Master Artisan
<Inisfree>, Tunare (Seventh Hammer!)