Heater control sliders and cable connections

I was wondering if anybody makes these parts? I did a search and couldn't find any suppliers. I was wondering if anybody has interest in these pieces if I made them? I have access to getting these made out of nylon (CNC machined, not cast) I'd make them a little stronger than factory. It seams like a common piece to wear out and make your heater controls sloppy.

Just gauging interest. Please let me know if you've seen them.