headphone jack broken. How to replace?

My headphone jack is broken on my latitude d510. sound comes out of one side only unless i move the headphone plugin to one side. it looks like the headphone jack and microphone jack assembley comes out and can be replaced but i have searched for this and cant find any replacements. i don't know what it's called. is it the sound card. nowhere seems to reference it in manuals or parts lists and no one seems to have this part. can anyone help?