Brake Fluid Leak on Master Cylinder any Cheap Fix..?

[xboxrox]

Looking for the cheapest n' easiest way to repair a brake fluid leak...

The red dash BRAKE light came on again a couple weeks after filling the brake system reservoir and it was 99 % empty this time, YIKES..! A quick look under the hood shows fluid on one of the two plastic cups on the master cylinder... Can this be fixed without replacing the master cylinder..? Local NAPA new $72.00+ tax

Time to inspect the rear brakes, the rear 1/2 of the brake fluid reservoir was dry, maybe a leaking cylinder there? The front brakes looked ok when replacing the shock absorbers...

At least once fixed the truck will be faster Any input is appreciated...