I don't the part number you are showing is the right one; It should start with a 986 or 996. Here are some references for repair or replace:
http://www.renntech.org/forums/index.php?showtopic=6174&hl=#
http://www.renntech.org/forums/index.php?showtopic=1512&hl=#
The mirrors aren't very expensive (about $20 (?)).