I am not aware of any CNC billet versions or 3-D printed versions.
Each housing is unique and different. Yup, left-hand and right hand and front and rear are all different. Each housing is designed to keep the reflector parallel to the car centerline.
I do know there are reproductions available from Wilkinson. I also know he thought the diagonal opposite corners were the same so he only reproduced two different shapes. I guess they will work but not true reproductions.
Good luck,
Larry