hey all, I did it no with additional purchases
I have an a7v, and placed the usb on a 5 1/4 bay.
just removed the bracket that attached the usb ports to the pci slot, put it between 2 large blocks of wood and hammered it flat. The beauty of using this bracket is that it already has one screw hole, I just drilled another on the other side.
next I outlined a rectangle on the 5 1/4 plastic plate from the case (the 7 bay enlight model, don't remember the #) and used a drill bit to grind away at the sides to make an opening (didn't have a dremmel).
Finally I drilled holes into the plastic to line up with the pci plate, reattached the usb ports onto the plate, and screwed it all together. Oh, and make sure the chord from the usb ports will still be able to reach the jacks on the usb ports.
Hope this helps, and sorry all this was so rushed. Hope it helps.