Verified answer

Try looking in the 4th edition character creation. They completely overhauled the system, but some of the additions they made, especially to magic users, are really interesting. There are a couple things in there that may help you build your character, even if you're using the older system (which allows for more creativity, anyway, as long as your GM is open minded).

Don't know if I know of any offhand, although I would just add the celestial template from the MM to a drow. But if you really want racial classes, I think you could easily use the template to make them up. It's a LA of 2, so maybe the smite ability and the energy resistance at first level, and the SR and DR at second.

And I can see why someone would still play 3e ;)

Don't play 3.5 any more (tho do play some Pathfinder), but don't recall a celestial class offhand - might you be referring to the half-celestial template? IIRC, they were in the Races of Destiny splatbook.