The clips are really needed in quantity now. They can be made of half hard steel and painted in the thickness shown, or unpainted stainless steel with a thickness of 0.003". The stainless steel option is better. Quite a high load is placed at the center of the clip, so it has to be strong, and not bend, or break.
The target price of 10 cents per clip is possible once we get to the 100,000 quantity level, but the tooling right now is about $8000. If you wish to bid on the supply of these clips, we are ready to issue a PO, if the price is right.