Check out the Hagerman Piccolo, especially if you aren't afraid of using a soldering iron. It is very good stock, but really shines with some very small improvements, like a better cap in one key location and some "boutique" resistors in 2 locations. All 3 of these "mods" are directly in the signal path so they should be easy to identify from the provided schematic.
It also provides variable loading on the fly with the flick of a knob and 3 different gain levels.
It also provides variable loading on the fly with the flick of a knob and 3 different gain levels.