You could download the 3d file for the shell of this camera and manufacture it yourself. All shell files are licensed with CC-BY 4.0↗
The files below are slightly modified compared to what you have seen in the posts, this is to better handle the dimension of existing parts, making it easier to print and also provide better handling.
You are welcomed to make this camera yourself. Depending on the availability of components, you might need to modify the topology of the circuit or the structure of the shell. Following sections of this page contains notable instructions for assembling the device by yourself. Resources for download is listed at the bottom of this page.
Retro Cam is licensed under GNU GPL v3. If you use Retro Cam in your application/made modifications to the Retro Cam and published your software, you will have to also publish the source code to your program.