Linear Tube Audio MZ2 would seem to fit the bill, but you really need to add their linear power supply to get the best from it.
https://www.lineartubeaudio.com/products/mz2mz2-s
Single input tube preamp
I'm looking for options for a 1-2 input tube preamp. Space-Tech Laboratory in Canada has the type I'm looking for but I don't know anything about them. If anyone has direct experience with them, please respond. Otherwise, I like to know about similar builders of small, tube line stage preamps.
Balanced preferred but not required. Thanks for any responses.