jacks, plugs and music on intercom

[Stefan Lörchner]

Hello,

I'm looking for a source to buy these heli plugs and jacks, called
U-174/U.
The only one I found was
http://www.aircraft-spruce.com/catalog/avpages/plugsnjacks.php

But they only have the plug and its quite expensive.

I want to build a box to input music into the heli's intercom; so if
anyone could give me circuit schemes I would really appreciate!

Thanks!