Instead of looking for something new, why not get down your local charity shop, junk shop or car boot sale and buy a box second hand.
you'll be recycling something and i bet you'll end up with with a machine which has a lot more character. only issue might be finding a cube. hmmmm.
i'm about to put a noise thingy together (singing buddha/distortion/echo/feedback!) and it's all going in a nice old wooden first aid box.