Here's a quick video showing what you can fit into Mantic's two sizes of plastic cases and an overview of the Mantic branded Battlefoam bag.
Foam and cases are bog money these days - there are so many great models being made and people want to take care of them. I have found the Mantic cases to be a great solution.
They are not the most glamorous bits of kit. They are a lot like VHS cassette boxes. Youngsters, google it. But with a bit of foam on each side, they hold models in place and provide hard protection against impacts. Stick them in the BF bag, also very attractively priced, and you've got a great way to carry round your Deadzone and Dreadball mini's.