Obliterator isn't a faction, it's a sub-group. And Pyro/Spark is the only Autobot Obliterator -- the other is Clench/Colossus who's a Decepticon.

How's the condition of the gold plastic on that Pyro, llamatron?

Anyway, I FINALLY (after a LOT of searching) found TFPRiD Ratchet today!