In search of a single sidedraft intake mani for a 22r motor can someone help me locate some or is it something that I would have to fabricate myself?

 

Curious, Why would you want a single sidedraft carb? From the times I've used singles they weren't much good for high end power and were less than streetable.

What would your planned use be?

If you want good streetable power increase a Weber 40DFEV downdraft with a Offenhauser or Cannon manifold would do better than a single sidedraft. Other than that dual sidedraft would be the way to go.
There were a couple of manifolds available that fit Holley carbs, both 2 and 4 barrel carbs. If you have any interest in that look at the circle track guys.

Just my 2 cents