Do you still have your packaging with part numbers (especially the plastic wrappers with the paper labels)? According the the parts list from the download section, the numbers should be:

Upper Right: 89423 03924
Upper Left: 89423 03934

Lower Right: 89415 53142
Lower Left: 89415 53152

NOTE: The format of the 10-digit part numbers may appear as X-XXXXX-XXX-X instead of XXXXX XXXXX.