Where to buy replacement charge port? Vivotab note 8

I've got an Asus Vivotab note 8, model m80ta, with a broken micro USB charge port, but I can't seem to find the parts, or at least the ones I have found are terribly expensive. Ideally I'd just replace the IO board, labelled 60nb04g0-io1030, but I've only found it in stock on one website, for $130. May as well buy a new tablet at that rate.

So barring that I'd like to replace just the USB port. Except the thing uses a goofy reverse mount thing that I also can't seem to find anywhere.

I'm not sure if I'm looking in the wrong places or just plain SOL, some assistance would be greatly appreciated.