I explored ways to attach the radiator at the top, and just decided as tight as things were without the upper bolts, I can't see it moving anywhere. So, no bolts for me. There are ways to do it, but don't see the benefit.

On the lower radiator hose, I just got mine back from Tubular. Unfortunately for you it is for the SBF, and for the angled inward fitting on the radiator. I had sent Tubular a prototype I made out of 1 1/2 PVC tubing. and they sent me a prototype that fit very well. They now have one to sell to the public.
Ralph