In case you go down the Kuda car mount path, below are my sources for the various pieces...
Nice setup. Do you have any pictures? I do not like the Kuda mounts for my vehicles and I will use Pro-Clip or Panavise, but the rest is exactly how I have mine planned. I'm just wondering what it might look like with the Kuda mount, since those seem shaped for vertical mounting.
One picture posted, and am attaching a PDF with 5 more.