Get a new master and install it yourself...it's very easy to do. Bench bleed it first (plenty of posts in the archives on how to do that). Then just bleed new fluid to all four corners, starting with the wheel fartherest away from the master (right rear), then left rear, then right front then left front. Even for the 'rookie' it should not take more than 3 hours max.....
BTW...buy a NEW master cylinder, not a rebuilt one. It's only a little more $$$, but it is well worth it....