Triple converter to 1/4" Jacks

Passive tripple converter to 1/4" Jack
or as they say on their site:
"format converter from little to big jacks.

http://home.arcor.de/trouby-media/modular/3he/jack3.htm

• 0 mA +12V
• 0 mA -12V
• 0 mA 5V

No info about availability.