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Oh now that is so cool. If anyone finds the step pulleys, let us know. That would be all the knife grinder I'd ever need.

This is where I first saw them.
He includes part numbers and ordering information.
http://www.knifeforums.com/uploads/1205593757-Delta_SA180_Final.pdf

It's bothersome that they had to be machined to fit.
Looks to me like the wrong pulleys were selected.
Five thou' of slop is okay ... just threadlock the set screws.
There really ought to be a cheap answer.