What's the best modern master cylinder for my 1974 Duster?

Hi guys and gals. Like many people, I'm fed up with my endlessly leaking master cylinder. I had both the original master cylinder and power brake booster professionally rebuilt. They both work fine, but the master cylinder continues to leak. Maybe from the gasket, maybe from the (new) rear seal - I don't know. All I know is that every Chrysler master cylinder that I've ever owned leaked, and I'm tired of dealing with it. Can anyone recommend a high quality modern MC that has the plastic screw on tops, that works well and doesn't leak, that's is easy to install? Any ideas greatly appreciated.