wiper transmission parts help

[trelogix]

I'm hopefully about two weeks away from putting the cab on my 66 back together and I've been going through and finding all of the needed parts for the process. I seem to be missing the piece of the wiper transmission that connects to the wiper motor. I've looked online and can't find anyone that sells just the piece I need so I'm going to go look through the local salvage yards. What year trucks will work? Is it just the 60-66, or does the 67-72 use the same connector?

Or if anyone happens to have they want to part with...

Thanks for your help.