Available as an assembled Module and as a DIY project.
This Module is currently available.
Clone of Buchla 171 instrument preamplifier
La Sesenta y Siete 171 Dual Instrument Pre-amplifier consists of two preamplifiers for electric guitars, contact microphones, and other low-level signal sources. Input impedances are 200 k ohms; input connectors are standard phone.
https://modularaddict.com/171-dual-instrument-pre-amplifier-pcb-panel-la67
These merchants probably sell this module. Huh?
Sears 171 -33654501
Audio Centron 171
UB3/171 UB3/171
Humes & Berg + Superslick 171=1 SB1=1
Humes & Berg + Superslick 171=1 SB1=1
Sears 171-33754501