68 and 69 dart parts cars

I need this section of the frame, if possible. *passenger side only*
Years ago when I ran Hooker fenderwell headers a section of frame needed to be notched...well a friend went nuts with his plasma cutter and removed way too much. This section is in line with the the trans crossmember, but between the main frame and rocker. Need as large a piece as can be removed.
Thanks!!