Hi,
The Porsche parts catalog calls them a 'shelf'.
The upper shelf is part #:996.552.253.01 01C satin black.
The lower shelf is part #:996.552.243.01 01C satin black.
The part numbers are different if you have leather.
Try this link...
http://e-partssales.com/Merchant2/merchant.mvc?Screen=PROD&Store_Code=P&Product_Code=shelf986&Category_Code=POTEBXIN
Regards,
mike