Master Cylinder - Cover Leaks

Flat-file the gasket surface, replace the rubber gasket with a softer more pliable one and increase the spring tension by tweaking the bale.
Yea I understand but the hard part is finding the right size one's they have the same shape but always turn out to be to small and don't work, if you can tell me the part to order i'd be happy to give that a try, but like ive said I have ordered 2 - 4 different ones but all seem to be to small.