This is a two-piece housing for the very inexpensive PS2 joystick modules that you can get on eBay. They are widely available for less than $2 each with free shipping.
This housing is small enough to hide in the palm of your hand if you are controlling a device during a performance.
No wire is shown, however, there is a channel through the parts to route the wire out the end of the housing.
The input to the module is +5VDC. The outputs are X and Y axis 0 to 5VDC proportional analog voltage, and momentary "ON" by clicking straight onto the hat of the joystick. These outputs are very simple to use as Arduino inputs.
An example source for joystick: http://tinyurl.com/qcfvatr
For printing the two parts: rotate so that the flat side is on the printer bed.
I printed in PLA with brim but no other support.
You will also need 7X #4-40 X .375" pan head screws, or similar.