I am hoping to install one of the Master Locks that are on a site that was: http://www.masterlock.com/cgi-bin/class_search.pl?class_id=CA_TS_07 The site should not be underlined, but it works. This was a suggestion from an Airstream person, I needed to find a lock for my '79 Argosy? Maybe they have something that will work. IZ