Again, thanks for pointing me in the right direction. I had seen "mirror mount" in my google searches and passed on them 'cuz I wasn't mounting it to the mirror! DOH! I "assumed" it wasn't what I needed. It's PERFECT! I have my flag mount on the drivers side of the Yakima, and I used some flat black paint on some parts, so we're thinkin' alike on that.
And I had read that thread in the wee hrs of the morn but someone had missed your pictures.

Yours looks like it has "rounded" grippers that nicely conform to the Yakima bar, so far I only can find the angled. I'll keep searching.

Also, I've seen both 2 screw and 4 screw models....the 4 like yours would obviously be more secure, no wobble possible, is that why you went with the 4?

Anyway, I'm pretty sure that's the way I'll go. Thanks a million!