We're always quick to chastise companies that don't meet our expectations and that's all well and good but sometimes I think it'd be good just to give a quick mention to those that do things right.
I needed a replacement screw for the switch assembly in my 6D Mag. Ryan helpfully provided me with a very nice parts request page on
Burton McCall's web site. I selected a new switch assembly, filled in my details and nine days later it dropped through my letter box. The assembly came with a replacement switch cover/boot and a hex driver plus pictorial instructions for fitting

My fifteen year old 6D has been saved from the scrap metal bin and is back in full operation.