USB Stick
thingiverse
First try to create an usb-stick. I took the board of an older usb cardreader. You have to fit the usb-stick basis.stl for every other electronic.
Download Model from thingiverse
With this file you will be able to print USB Stick with your 3D printer. Click on the button and save the file on your computer to work, edit or customize your design. You can also find more 3D designs for printers on USB Stick.