Googled that part number and saw three mail-order websites with it ready to "put into my cart." Range $60 to $70. Didn't look unavailable.
http://www.fordpartsgiant.com/parts/ford-mat-loading-compartment_6l2z-99112a15-a.html
http://www.silverstatefordparts.com/partlocator/index.cfm?action=AccessoryCatalog&catalogid=3792&siteid=214290&categoryID=142992&subcat1=143579&subcat2=143580&subcat3=143591
http://www.oempartz.com/oem-part/oem-ford/mat-left/6l2z99112a15a