For reasons I won't go into, I didn't want to replace the break switch, myself, so I called our dealer.
Initially I was told they would write it up for $125 to diagnose the problem. I didn't say anything. I just booked the appointment.
When I showed up at the dealer's service counter, I took a printout showing the part I wanted installed (currently $7.49):
They dropped the $125 diagnosis nonsense and charged me for 20 minutes of work, which I figured was reasonable, and $8.50 for the part.
At $46.65 total, I believe it was a win-win. So for anyone who chooses not to replace the switch themselves, going to the dealer _is_ an option.