Where can I purchase a replacement audio socket?

I believe my audio socket is faulty, as sound only comes out of both earbuds on a pair of headphones when you hold the jack in a specific position.

Can anyone advise where I may be able to purchase a replacement part for the audio component on the Microsoft Surface?

Microsoft's standard out-of-warranty repair and service charge is £125. I hope I will be able to fix the device for much less!