does anyone know if you can get repair panels for this area at bottom of cowl/firewall or does this fall into the make your own catagory.this hollow area was filled 3/4 the way up with powdered leaves.i cant figure out how to add pictures to this post but the area im talking about is behind where the lower fender rusts out on a 70.the lower fender mounting area is still there but the metal around it is thin