For Mr Rovernaut: Mick (Cal415) is right about the Karcraft flange - it's all-in-one and a direct fit. I didn't mind paying the $140 because finding that spacer would have been a nightmare. As to the mudslinger rubbing on diff itself, I can't detect any problems so far, although I must admit that there is a ever so slightly different note to the diff whilst driving - will have to keep an eye on it I suppose.

