I actually decided to go local with just a simple bitless bridal, leather. However still interested in spring release bosal, If a second option is needed, this will be my 2nd choice, will keep you informed ...
Have you got pictures? Does it use any sort of mechanics like crossing under or shanks or anything? Or is it just a firm noseband sidepull? Curious to know what you went with and what you think of it :)
I've never actually tried it because I've been away from horses for some time, but I really like the design of the "nurtural bridle" (yes, that's the spelling). I think it's an improvement over the Cooke bridle because it has a special piece underneath the mandible and a different crownpiece going behind the ears so that the reins cannot dangle or slip out of place when pulling side to side. Again, I've never actually used it but based on what I've seen on their website, I'd really like to try it someday as I really like the idea of going bitless.
I am not a fan of any bitless bridle with the leverage/constricting/squeezing and cross-under type of action.
I only like a classic sidepull with the reins on the side, even better, slightly higher up on the sides....and with the correct fittings to keep it stable on the head for no twisting. I also don't like rawhide on the nose, but a stiff leather is fine or covered rawhide.
The only ones like this that I know of are:
Lindell (Linda Tellington Jones Sidepull)
Diana Thompson Sidepull
Buckaroo Leather sidepull (remember - the jowl strap is critical for stability and clarity of signals and to prevent rubbing across the nose)
Moss Rock Endurance and another Endurance company make this design too, but I don't like the beta strap across the nose as much.