Praco is the flash for a Yoda, but I believe Bolsley has the correct top flange look. Might be incorrect on that.
I know the base of that is incorrect.
If you are building one for the E.T. species, make it what you want. Use the black part from the top and move it down to be a control box, but overall it would be your design. I do not believe there is a set design for them.