Sorry RBJ. I wear a youth leatt with a youth EVS Revo protector, but I think that isn't quite what you want. I know they work well together for me, I don't use the extra straps for the leatt because the protector holds it very snugly in place. My boyfriend has the same set up but in the adult sizes, he does need to use the straps though because it doesn't fit so snugly.
Anyway, I know your kid has the EVS brace but I would think it would work with the EVS brand protector?

The reason I first went for it to run with the brace was it was more cloth and had a flexible opening for the neck.
BUT the Revo isn't exactly on par with what you are posting so far either...