The file 'C-3PO Chest Piston 3D Printer Model' is (stl) file type, size is 261.6KB.
Another part I designed based on pictures and parts I could find. An original design of my own, but obviously meant to look like the chest pistons of C-3PO.
There is a hole in the bottom that will accept a piece of 12 gauge wire to use for mounting to the upper chest of C-3PO.
I recommend printing this laying down. The print might be a little rough on the bottom edge, but I think with some tweaking of the print settings, this can be minimized. Even with issues, the rough spot can be oriented against the rest of the chest, and mostly hidden.
C3PO_ChestPiston.stl | 3.6MB |