Springy wire with custom cross-section

[Swamp Thing]

TL;DR

How hard or expensive might it be to draw spring wire with a non-circular cross-section?

This potato masher youtu.be/j5IXRT3uxbA?t=170 would be easier to use if the spring wire had a tear-drop shaped cross section, with the pointy edge facing downwards.

But how much would it add to the cost and feasibility? Can standard machines be easily rejigged to make non-circular wire?

 

[JBA]

Actually the current design is the best because the outer coil(s) trap and contain the potato for mashing by the inner coils. The reverse would simply push the potato outward w/o much mashing.