Our company has 2 24" Leblond Makino's that are over 20 years old and they have been in production the whole time. Other than general maint. and little things here and there they have run the whole time. About 5 years ago they bought a Clausing gap lathe it was only 15" but it has held up well. I'm not sure if Leblond Makino still makes manual lathe now that I look around on the net. I'm sure you can ask a machine sales man if they are still out there. I personally have a 1989 15" Leblond Makino Regal servo shift and I love it.
Well thats my two cents,