I have a lot of experience making oddball brackets. I usually start with wide strips of aluminum cut from soda cans to get my basic shape and form. Then I trim those down and mark the bends, flatten them and trace them onto thicker flat stock and transfer my bend marks. I make any cuts, shape, and drill holes while the stock is still flat. Then using a bench vise and a pair of adjustable wrenches I bend the stock into bracket form. It's not always perfect as there can be distortion/misalignment going from a super thin piece of aluminum to something more substantial, but you figure it out as you go.
Honestly, I have the windshield from hell in my Titan. I've been trying to find something that will mount similar to the way Star ULB9's can mount, just on a larger scale.
The interior bars mount using the sun visor pivots and the sun visor clip mounts as anchor points. They're far too large and heavy to mount to the windshield. But if you're looking to mount something smaller and lighter like in that photo, check into radar detector mounts that securely attach to the factory rear view mirror mount. There may not be one listed explicitly for your vehicle, but with a little research you might discover someone has figured out a mount for a Maxima mirror works for a Titan... just a random, made up example.
