[Walt Fricke]

$100 for two good used housings sounds like less than a machine shop would charge. These were not made to be replaced, so it might take more than just pressing out the old and in the new.

If you want to be inventive, you can find a thin brass or stainless steel sleeve which fits your shaft tightly, maybe with some epoxy underneath to fill the grooves, and have Henry Schmidt bore his fix for your need to be updated arms a bit larger. The longer bushing avoids the off kilter loading which led to this wear, or exacerbated it.