Look on the inside of the firewall where the master is. 9 out of 10 once the slave starts leaking the master isn't too far behind.
www.JNZtuning.com If you have a leak go ahead and order one, (they are less expensive than autozone too) because it does take about a week for them to get it and get it to you.
Then go get a 10 mm line wrench, a deepwell 12, standard 12, flex head socket driver, and a standard socket driver with short extension, and do it your self.
The slave is the easiest one to do, i must admit. Took me 20 minutes for the slave and about an hour to do the master.
Also double check for leaks at the slave while the engine is hot and a friend pushes the pedal, and wiggle the reservoir hose to make sure your master has fluid and any air comes out of it.
I ended up replacing the master AND having to add an RRE SS line to replace the factory line that was leaking.
also tread the RRe article about setting the pedal.