OK I don't know the name (I think it would be called a front
hub) or part number but here is a photo:

http://www.gowesty.com/Merchant2/graphics/prodpics/251-698-
123-124.jpg

The part I am wondering about is midway down the photo on the
far right (and its twin on the far left), the part with the
wheel studs connected to it.

Anyone have a part number? How much? Where I can get one? Is
the round metal backing just a plate, or is it a fairly thick
part?

Thanks,
Chris