Hello !!
I read all your project details and i know what exactly what i can do for you ,
i am architect and i have work for many years in 3d models and i saw thats what you need i can do ,
i can do some of the best design for your product ,
im good designer so i can reach some good design for your product even for inner box i can show many origami designs
you can contact me because i can not see picture which you have posted here so the best will bee to contact mee
i wish all the best