Thanks to all who replied via the list and pmail.

I found the 17mm Transmission plug allen socket (EMPI brand) at Bow
Wow @ 124 West 4th, in Vancouver for $5.00 Cdn.

While CIP1.com also had it, I didn't want to drive all the way to
Langley and I didn't have an order over $50 to get free delivery.

Note to Vancouver folks, Bow Wow moved from their south Cambie
location to W. 4th  some time ago but never updated their web site
with their new address...

-Paul