No info about availability.
passive strummer
Modeled after the Error Instruments Raw Spring. https://www.errorinstruments.com/a-50804780/welcome/raw-spring-nano-noir/
A spring with a piezo contact mic. Works well with a resonator like Rings.
Included in 3 Racks, 2 are public:
Fender Player Mustang Bass PJ with Pau
L.P. Santana
Hohner 560PBX-C Progressive Series 560
Fulltone Full-Drive 2 Mosfet
Gibraltar Boom Cymbal Stand
Fender Bassbreaker 15 15-Watt Guitar