A recent eBay auction listed a newly identified  variety of the 1996 Royal Hawaiian Mint RIMPAC medal. The obverse feature a hula girl instead of the attack on Pearl Harbor.

This is the version (page 3, bottom) listed in Waifs in Gold Boots (RHM database).

http://www.royalhawaiianmint.com/newsletters/34-1996_November_Annual_Christmas_Issue.pdf

This is the new variety http://www.ebay.com/itm/1996-RIMPAC-Hawwaiis-Hula-Extends-Aloha-to-RIMPAC-Silver-Proof-Islands-of-ALOHA-/262414279354?hash=item3d191c22ba%3Ag%3Ar0sAAOSwUuFW1iQH&nma=true&si=RFHj9A%252FaN5OKcR%252BoF4fkxElLEfU%253D&orig_cvip=true&rt=nc&_trksid=p2047675.l2557

If you carefully look at the listing of the RIMPAC in Waifs in Gold Boots, the number 165 is listed under the 420. It is my best guess that the RIMPAC hula girl medal was to be filled in after the Pearl Harbor RIMPAC medal.