This process is involved and tends to get expensive but it would be possible to cast duplicates of your appliques that are broken. I would use epoxy and wood powder instead of the brass though. Also check out picture frame repair. They use a similar process using silicone molds and plaster to replace missing pieces. Otherwise your best bet would be to watch Ebay for the right drawers to come along.
Rodney
I forgot to add the link:
http://www.youtube.com/watch?v=2sZ2tUxx0gc