Here is. This is two-component 1.75inch diameter tube that can fit three-prong plugs that are bent at a 90deg angle (L shaped). Max span is 142.5mm correcting for the section that fits on the wall. When fitted from each side of the wall the smaller tube should fit into the bigger tube.
Print it. Cut the hole in the drywall. Paste using clear silicone. Feed the wire through. Done.
Attribution - Creative Commons