What methods existed for boosting caster level in D&D 3.0 (before 3.5)? I'm looking for straight boosts, so something like the good domain boost to good spells only is not relevant (unless there's a way to make it apply to all spells).
I know of Karma beads (from the necklace of prayer beads) and the spell death knell. It's hard to believe that's all there is though. ("Gain levels as a caster!" doesn't count.)
I'm playing in a D&D 3e-only campaign, so material before or after is not acceptable.
I have not been able to find any consolidated list or useful discussion with google.