I dont think you will find a replacement one that will be realtree or camo colored. Generally they are red, black, silver for the 8330 models, but check out ebay.
Check out e-bay. They have all sorts of faceplates for the blackberry smartphones. I don't know if they have a replacement housing for your phone in the camoflage but I have seem the camoflage snap on cover for the blackberry smartphones on there.