Rig it up! hah, i've seen people post there full computer in fishtanks with olive oil filled up, i've seen people with it mounted to there wall, in card board boxes, just keep it some where save and wait a month then get your case.
well a wooden board is like 10 bucks. All you need is a few spare standoffs. he doesn't have to go all out like my previous example. and would be a hair safer then just laying all the parts on a piece of cardboard. But I agree, if you don't have a saw, drill, hammer and a few nails then just go buy a case.