I have a list of some Canadian screen suppliers home. I'll try and remember to dig it up. Includes some models and now outdated pricing but it will get you started.
I don't know if there are any acoustic transparent models in my list as I decided against going that rout but several of the suppliers in the list offered one. I had concerns that anything porous enough to be truly acoustically transparent would sacrifice picture quality, or vice-versa. Because i couldn't find a definitive answer to that question, I played it safe as I kind of like seeing my speakers and I won't lose precious room space behind the screen.
