Versauce, you can just write the designers for permission to display their CPs at your exhibition. The worst that can ever happen is for them to say no and you'll end up displaying their models without the CP. And the best case scenario is getting a yes for an answer and you'll probably convey your respect directly for their work.

Mind you, your description, the models, and folds are much more important than having the presence or absence of a CP.

Wish you the best with your Exhibition.