Paul wrote:

Wish I would have seen this before I went to the shop today. I did find
the spare plastic bushing, it's a red or maroon plastic and I'm
guessing that it's the piece for the movable motor pulley half.

More of a brownish if it is current stock.
http://wess.freeshell.org/clausing/bushing2.jpg

Fits either pulley after you bore it to fit.

Wes