(If you solder the Germanium transistors close to the PCB, the depth is only 32 mm.)

http://www.thonk.co.uk/2014/04/touellskouarn-strakal-brulu/

• 20 mA +12V
• 20 mA -12V
• 0 mA 5V
• 32 mm Depth

Module is available as a DIY project only.

No info about availability.