Brake Master Cylinder problems of the 2012 Toyota Tundra

While driving the truck the brake pedal sink to the floor nearly causing an accident. I bought the truck last year and it started after the last service by a Toyota dealership. The same thing happend to my wife while driving the teuck with my kids. It happens unexpectedly losing brake pedal resistance causing brakes to skin to the floor with minimum to no braking power. This was reported to the service agent who was able replicate the issue; howere, red mccombs Toyota of san antonio TX wanted to charge me $1500+ to replace the brake master cylinder. That was pretty high for just that. I was told the labor was very expensive. I told him I couldn't do it and that I may have to take it somewhere else and I was simply told to be careful driving it. I am having midas replace the brake madter cylinder. I did my reseach and found various Toyota Tundra online community forums and a lot of customers have experienced the same thing. Some with as low as 30k miles. I had arounf 89k, but a master cylinder shoild hold up to at least 125k miles. I contac Toyota corporate and the contacted me ack ver quick but did not had the time to disccuss as I was driving. I feelthere needs to be a oossible recall.