Tip from my Dad, a retired TV tech: GE hand mixers from the 60's and 70's had detachable cords that were ideal non-polarized cheater cords. Heavy duty - some were 16 gauge stranded, versus the 18 gauge SPT-1 wire. We had two of them - a red one and a white one. When the female connector got loose, we just crimped them a bit with a pair of pliers.
Just about any appliance service place should have them -
Here's a photo of one:
http://www.junque-ez.com/images/cata...ectric_540.jpg
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Cheers,