go to a glass/window cutter.... have them cut a black lexan circle with a small rod glued in the middle (to connect to the "W" nipple) attatch to existing ledge.... and viola! you now have a black mirror finish W7 flat piston!
and do i ask them to cut a 12 in lexan circle, then cut the broken cone off, put a small rod in middle, connect it the the "w" nipple and glue the lexan circle to the sub?