Sorry, i don't know much about the Dragonlance setting (asides from the novels)... Is MIC allowed, or does you DM allow it, in that setting?
If so...
- "Tome of Worldly Memory" (MIC, p.190, 1,500 GPs) - if you have 5 ranks in a Knowledge skill, standard action to gain +5 in a Knowledge check, otherwise it takes 1 minute, 3/day.
- "Parrying" weapon ability (MIC p. 40, +2): +1 Insight bonus to AC and all saves. Put it in a spiked gauntlet? or shield/armor spikes?
- "Artificer's Monocle" (MIC, p.72, 1,500GPs): With all those knowledge skills, you can't miss this one to identify stuff.
I don't know if other sources are allowed, but when combat and knowledge are together the "Knowledge Devotion" feat from "Complete Champion" pops up instantly... mix it in with the "Collector of Stories" ("Complete Scoundrel") and you can get some nice insight bonuses for attack and damage (applicable to spells, as well).
Hope this helps.