Good matching tube preamp for my rb-1090 ??

Hi everyone, I am looking to find a good tube preamp for my amp. The problem I am having is finding one with a compatible output impedance. The reason why I say this is because I do not understand preamp output impedance or amplifier
input impedance, and how they should match.
The input impedance on my amplifier is 37 ohms, and I am using 12 foot interconnects from my current preamp.
What brands of tube preamps should I look at that will work? Thanks for any
helpor feedback.