I got my TK ESB armor build completed and as @TheRascalKing mentioned, the Husky Toolbox works perfectly fine for the armor, you have to either get a bag for the helmet as that one will not fit. I will upgrade my case today with neoprene foam (self-adhesive) to soften and protect the armor in the box. Besides the armor, all accessories are in there too (E11, boots, etc.).
It is perfect size, affordable, and will fit into a regular cars trunk as anything else I found to be too big to fit.
Hope this helps.