Originally Posted by Airscape

You already found all there is to find basically for xfire specifics. There really isn't much aftermarket support. Most upgrades are taken from other MB models as far as under the hood stuff goes. There are a few board members that make bits and pieces or supply used items. If you are looking for something specific checking old posts or asking if anyone has done X or upgraded X should get you some results. As far as online storefronts though, not much out there.