I tried getting the red, metal flipper button at a few big parts places, and every one of them has a disturbing little bump in the middle that is easily felt when pressing against it; it's so annoying that until I can get my hands on a good pair, I'm just going to use the old faded ones. I'm sure the manufacturer had just decided that it was cheaper to manufacturer to have the bump.

I wonder if anyone has remade this part (at a much higher price) the proper way.