[Stinky Pete]

Looks pretty simple to machine one up. Looks clean enough, although it looks like there's a lot of potential for profanity and a slight risk of cross-threading while you're putting the rear wheel on the bike.

But, like Kgb said - any machine shop should be able to whip one up quickly.

If the ends are salvageable it will be a lot cheaper. I can't tell from the pics exactly what's going on with it.