I primarily joined this forum just to ask this question, sorry if that's frowned upon. Anyway... I'm trying to repair a little practice amp which has a broken input jack, but I'm having trouble finding a replacement. It's a 1/4" mono switching jack with a SPST push to break switch that's operated by the jack being inserted. The switch is completely electrically separate from the jack contacts and this is the problem. All of the switching jacks I can find connect the tip and sleeve to other contacts when the jack is removed.

I made a bad diagram in MS paint showing how this socket is:


Can someone help me find another one of these (preferably more robust though  ) or even just point me in the right direction with something to google? I've tried lots of different searches and only found things like the 'mono switched' in this diagram: http://www.neutrik.com/content/technicalsupport/faq.aspx?faqId=205_747846926.