I would simply take 2 sheets of styrene, glue them together at an angle, brace them.
To make a new part
1.) slide the original part over the end of the triangle,
2.) mark it,
3.) cut/file a groove across both sheets of styrene corresponding to your marks.
4.) lay wire into the groove bend ends down, cut to size finished.
Repeat for different sized handles(top and bottom of the jig can be used)
Patent still pending, will charge people that use the design later on.