Heheh, sure there is a part number in the glass roof. Its because the dingus who ruined your fastback used another fastback's rear window to do it!
http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&item=2452148470&category=6236
http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&item=2452148470&category=6236
