I don't know if you already found what you need. But, in case you don't, here it is:
35RAPC4BHN2 - Phone Audio Connector, 5 Contacts, Jack, 3.5 mm, PCB Mount, Silver Plated Contacts, Plastic Body
brand: SwitchCraft
I bought them from Farnell around 1 dolar a piece (+/-)
Regards