Passive Preamp Recommendations?

I'm looking for a passive preamp to experiment with.

I currently have a McIntosh C2200 which I love but heard a Placette passive at RMAF a few years ago paired with a
Mc 252 power amp which I have and the sound was mesmerizing.

I'd like something used but used Placettes are hard to find.
I'm considering a local design - Fletcher-Harris Dimuendo -for $600. which is reasonable but would like suggestions on other possibilities.