I am guessing no one knows any other sources for this?
Well, there is a Wild Mage prestige class in Complete Arcane, but I wasn't particularly impressed. One problem (at least for certain characters) is that it is a prestige class - your character has to start out as some other type of arcane caster, and then 'go wild' as it were... but it might be what you're looking for.
Charles
Not to mention, the Complete Arcane version doesn't bare even a passing resemblance to the 2ed Wild Mage. It is however
WotC's take on what the Wild Mage looks like in 3.5ed. It at least maintains full caster progression... If it didn't do that it would suck.
For a wild mage base class like 2ed I'd make it the following way:
1.) Make it like a specialist mage without an opposing school (or maybe one opposing school depedning on how severe my surge chart was; bonus spell slot must be used by a wild magic spell). d4 HD, good will saves, familiar, scribe scroll @ level 1, possibly eliminate the bonus feats @5, 10, 15, and 20.
2.) Set up a surging mechanism (this is tough as it needs to be meaningful but it also needs to not kill the caster very easily; even 5% cahnce of surge and 5% chance of terrible death is almost sure to kill the caster before they get to too high a level even though there is only a 0.25% chance of dying at any casting because the number of castings is likely to be large).
3.) Randomize the caster level as is done in both 2ed and 3.5ed versions of the mage.
4.) Trick it out the class with wild magic spells modled after the ones that were found in 2ed (look on-line and you might find some conversions already made). When choosing new spells at level up, the player needs to choose one of his spells to be a wild magic spell (so make sure you have enough to go around).
5.) Make a few feats for the Wild Mage; something that allows them a chance to suppress surges into fizzled spells would be good one but don't make it too easy.
-Starcrunch