I leave at least half of the older Crown Vic/Grand Marquis/Town Car ones for others to get, I always grab the color switch bodies from FN10s, and selectively grab them from Continentals. I am not destructive in removing them unless the door panel is already destroyed.
If I could mail these out for cheap and in a way they wouldn't get broken in the mail I would happily send them out. They seem to be very poor quality on the early FN10, the 95-97 Panthers that use the same switch body the button is better quality, and 98+ with the different switch body same better buttons.
I rarely if ever pay for them. Only when I had two full switches did they charge me for a connector end (75 cents), generally don't charge for things like this, depending on what else you have. I didn't start "collecting" them until mine broke, and I couldn't figure out exactly how they went back together (and I found the retaining ends on mine had broken off). Only other thing I seem to hoard are good condition Continental exterior door handle buckets and handles, in available FN10 colors or chrome handles.