Thanks for the links guys, but I came up empty. Guess I'm stuck buying OEM replacements.
I gotta defend the TTR-225 here - it is the perfect wife-bike. Where else can you find a new bike that costs less than $3000, has an electric start, is low enough to let the little woman touch her feet down, and makes the majority of it's power right off idle? For her needs, the bike is perfect.
The TTR-250 ... eh. It's ok. Good to learn on. Obviously my biggest bitch is the lack of power. I'll probably get a DRZ400E or KTM 400EXC next year (or a WR426E, if they decide to make such a beast...)