This mount is designed to fit the following enclosure: https://www.thingiverse.com/thing:1976962
You just need the front and the back from this file.
Update 1:
Added longholes for the screws and added the step file
Update 2:
Made it more stiffer and added the previous version to the OLD folder
The author marked this model as their own original creation. Imported from Thingiverse.