[Henry Anthony]

Reply to Nuttyman54,

"Some bending/stretching may have to occur."

That's exactly why I suggested a die designer may have further understanding of how to develop this part. Metal forming operations often involve stretching metal in a controlled manner. The part can be probably be successfully approximated being built by hand from sheet metal but would not end up as a true helix. As far as functioning for the intended purpose - no problem.