There were 2 shuttles there last year, Budget and Avis. Budget is just 1/4 mile south of the port and Avis is about another mile down A1A. Be sure to have a current reservation because they don't keep a large inventory.
Teresa and Larry
#36-Carnival Splendor 9/16/12
7 night Mexican Riviera
#37-Allure of the Seas 11/11/12
7 night Eastern Caribbean