Preamps with separate L/R volume controls


Does anyone know of quality preamps, other than Audible Illusions, that have separate Left / Right volume controls?
beisner
@kalali no functional difference, but typically some implementation difference.
Just trying to understand why limit the options if a balance control serves the same purpose. 
Dual volume control is an idea that I really like. It is technically a much more purist approach than balance control, I understand.