For Al, try the aluminium alloy manufacturers websites like Alcoa and Constellium or whatever they are called this week. It will be a plate alloy or perhaps in some circumstances an extrusion. I would have thought the Al alloy manufactures would be pleased to gain as much publicity as possible from their materials being used in consumer products. But then again we are talking about companies that let composites eat their lunch in aerospace, and have failed spectacularly to get Al into automotive structures.

Try sometimes popular websites:

http://www.dailytech.com/Analysis+iPhone+6S+May+Use+6013+Aluminum+Alloy+Instead+of+7000+Series+Alloys/article37405.htm