Yaesu 7-pin plugs are available from Kinetic Technologies (see below).
-- from amsat-bb reflector,
Advanced Industrial Product (AIP), has changed it's company name to Kinetic Technologies. #
They can be reached at 800-877-1521.
-- from Karl R. Sandstrom, K5MAN
The Advanced Industrial Products web site is still online.http://www.aip-usa.com/
I ordered from the Lexington, Kentucky office. #I think I dealt with Tina Stanley. #email@example.com # 859-255-1911 ext. 113.
Nanaboshi NJC-207-PF is the plug for the control cable.
Nanaboshi NJC-207-RM is the panel mount socket on the G-5500 motor.
Nanaboshi NJC-207-AdM to add a pigtail socket to a G-5400 motor.
I found it, hope this helps!