I can't find any that are prism shaped (in the short time I spent on the website). I don't actually know what kind of manufacturing challenges you get if you wa

I can't find any that are prism shaped (in the short time I spent on the website). I don't actually know what kind of manufacturing challenges you get if you want to place these splitters at the center of a prism. However, I'd guess these are the components the guys are using between the prism and the cameras.