the flip top subframe is for sure a long shot. you might have to wait months maybe years for one to show up (if someone actually has a spare to sell). I think your only option at the moment is to contact Laegers directly if your buddy insists on a true Laeger subframe. other option is to have one made by an atv fabrication shop. one place that comes to mind is HRE (in Pennsylvania).
good luck
Joe