"head" amps??

The gain on my CAT Ultimate's phono stage is borderline for the Koetsu Rosewood Std (0.6mV) that I'm using. I know the cartridge can be more dynamic and open than it's sounding; I have to crank it to 3 o'clock on some recordings to get good sound. Years ago there used to be pre-preamps or head amps for adapting low output MC's to MM stages. Do any neutral modern day ones exist?
PS. For various reasons I don't want a separate full function phono stage.

Ken