Headphone port broken on iPad Air
iFixit has great electronics repair guides and they sell parts, too (though, at times they can be overpriced). Here's the link for the iPad Air Headphone Jack Replacement Guide (it's for the Wi-Fi-only model).

I hope you have some experience with repair, because the first time when I opened up one of my customer's iPad to replace the digitizer, it was quite a task. Just consider taking your iPad to a pro before attempting the repair yourself.