Your subject says "Cub Pack", but that looks like a picture of the Wolf Pack?
I can't answer your question on whether it would fit, but if you want something more budget oriented you may want to consider these:
Ridgid 22in Pro Box
Depending on your use case the openings on the sides and lack of a lid can be downsides, but they stack and latch together nicely and you can latch a toolbox in place to use as a lid or stool top. I'm guessing it's too large for an Aluminess box, though.