Pre-made enclosure for a self-made mobile device (1690142)

Hello boys, I'm trying to build a mobile device by myself. I have all the components except one,the form factor. Since I haven't the money to ask someone to make a customized box for me,I ask your help to find a pre-built solution somewhere,that could be searched for example between the computer toys for kids or from some cheap gadget or from some nice hard disk box,so that I can make some little adjustement manually and it's done. The first and only rule to follow is the price that should be under 10 U$. Infact I need only the enclosure,not the electronic circuitry inside. The box that I'm looking for should bring inside it this expansion board : [login to view URL] this mother board : [login to view URL] and this battery : [login to view URL]