I have been looking into this as well. Restoration Design sell the real cross member panel for $475 which looks like the same one sold by S t o d company for more money. Call Mike at Restoration Design and talk to him. He is very nice. He just sent me some pics of the part.
Mike de Jonge
Restoration Design Inc.
(519)-836-3555
(519)-836-3577 fax
Restoration Design Porsche Parts
mike@restoration-design.com