Why not get a CL32, 34, etc? They are nice sounding preamps. But I would guess you would want to get the caps replaced on whatever you buy. They are very rich and organic sounding. A classic 12AX7 sound. So the system will be a little laid-back.
I have two pair of MB3045. One with original tubes, one with KT88's. I don't use them. They're in my office museum. I just bought a pair of Dahlquist DQ-M9 that are mint, and I'm going to have a retro system from 1979 I can play with here and there.
I was really excited to get the Dahlquist here. But I plugged them in, and they are nothing near my Sonus faber Guarneris. Not even close. I was shocked and a little bummed.