Here's one source:
http://www.rffun.com/catalog/parts/power.html
Alan AB2OS
On 06/14/04 10:00 am Brian Kelly put fingers to keyboard and launched
the following message into cyberspace:
I'm tired of paying $35 for power cable assemblies for 100W Yeasu
xcvrs. If I had the connectors I could build my own cables for a lot
less and do a better job of it than Yaesu does. Does anybody know of a
source for the connectors?