Single Groove Crank Pulley?

OK, now that I have ditched my power steering, I would like to lose the 2 groove crank pulley on my motor. Where can I get a single groove pulley that will fit a later 360? I understand the older (1970-ish) pulleys had one offset hole to make sure they only went on one way. One of my club memebers just told me to slot that one hole and eveything would be good.

Unfortunately, I can't seem to find a single groove pulley anywhere. (OK, not without paying out the *** at one of the restoration companies).

Any ideas???

Good places to get one? Or, who has the super stash in their garage :)