Need help with updating brake master cylinder

[NJM73]

I want to put a newer brake master on my 85 1 ton. Looking for one with a screw on lid plastic reservoir style. Reason being is that I am tired of going through gaskets and tension springs on my master. I keep the fluid level low too hut nothing seems to be a permanent fix.
Truck has hydroboost
Just tried early 2000s vac and hydro masters but both had bore too big to fit into the hydrobooster. The 90s chevy ones dont look like they would be much better than what I have now.
Wondering if there is another application that would have a master with a smaller case bore diameter. Trying to stay Chevrolet since everyone else went to metric fittings off the masters