I came across an ebay listing for NOS older style cheater cords on ebay.
They are made by Belden and at $3.50 each plus shipping, appear to be a good deal. The picture with this listing is not very good, but they looks like the older, non-polarized cord type.
http://cgi.ebay.com/BELDEN-CHEATER-C...item5d2d527fc3
Cheers,
Terry