Larry makes plugs that fit some Garmin models:

Larry supports Garmin GPS owners with plugs and cables - since 1996.

Larrys Plugs:

The Company

Purple Computing (since 1983)  
P.O.Box 100
Murphy, OR. 97533

Cables made with Pfranc plugs:

Ready-made cables for Garmin GPS, and more :

Today's cartoon by Ted Goff

Ted Goff (back in 1996) said I can display his Cartoon-Of-The-Day from Mostly Business here - for free!