Is there such a pickup available?

[Francois Blais]

Hi.
Please forgive my bad english in advance!
Anybody knows of a piezo pickup which would be encased in a body similar to a screw, or a bolt?
Cylindrical shape, with threads on the outside, so the pickup can be screwed in a threaded hole in a bridge or something?
Is there such a beast on the market?

Thanks in advance!
François

[msw]

Sounds as if it might be an old Polytone from the late 70's.Possibly.

[msw]

image is at: http://www.doublebassguide.com/pics/...e_antique2.jpg

[jonas]

Can this be the Balsereit? It's piezo is ncased into a conical bolt, but without thread.