I'm starting a project for a trackball controller for Katamari

I want to find a cheap durable case that can have the top panel easily swapped out, like SimpleCase.(wonder what happened to this guy) Anyway, I would make the entire case myself if i wouldnt have to pay for tools, Im broke and trying to dodge that. If all goes well I'll have a very interesting creation for the check out my new arcade stick thread.
Thanks in advance, yo.