I gutted an old Fishman Pro-EQ and mounted it in the pickguard of my MIM strat...a little fugly, to be sure, but works great with L.R. Baggs piezo bridge...
Ooh, so that's just a clean amplifier? I may just try to do something myself, in which case I'll probably opt for a simple pair of dedicated volumes and a knob to boost/cut the treble. I probably don't really need onboard mids or bass to be honest.