Available as an assembled Module and as a DIY project.
No info about availability.
Mikrophonie Contact Mic Module Kit
The module will work with both DIYed contact mics made from inexpensive piezo transducers (instructions coming soon), off the shelf contact mics (often called Piezo Pickups) made for guitars and violins which you can pick up for ten bucks from Amazon or eBay or more bespoke mics like the popular Jez Riley French models (including hydrophones!) which are firmly aimed at Sound Designers.
These merchants probably sell this module. Huh?