no one is gona do this unless u put cash on top. do wut honkeyfuck said to do. id weld on a plate from the bottom (not much bigger that the size of the hole), then fill in the difference on the top side, or a piece like a penny and weld that in the old hole. grind it down smooth and lay a thin layer of bondo over.
just a plan B. if u kno wut i mean