Here is an elcheapo little jig that can be found for sale in a lot of places:
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Another inexpensive wire bender from same:
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This is another one that I like the looks of, WT has about the cheapest price I've found for it, Micro-Mark has it too:
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I would like to see some measurements and/or plans for the latter. Looks decent and shouldn't be too difficult to build.