I don't have a setup fee. That has been paid. I can get the flanges cut all day long. But you have to pay material, the cutting labor, and the labor for the hour of time to drive down there and back. By the time all of that is done, you are looking at $50-100 per pair.
If only you order a pair, that raises the price quite a bit. I am willing to keep 1 set here for stock, so that is 2 sets. But to get better pricing, 10+ sets need to be ordered.