HiLetGo 5v Relay Module Mount
myminifactory
Here is a file I just made for a HiLetgo single channel relay module that is available here. https://smile.amazon.com/gp/product/B00LW15A4W. Just a simple mount with standoffs and one hole on the bottom for mounting. This might work for the 12v board as well but I do not know for sure.
Download Model from myminifactory
With this file you will be able to print HiLetGo 5v Relay Module Mount with your 3D printer. Click on the button and save the file on your computer to work, edit or customize your design. You can also find more 3D designs for printers on HiLetGo 5v Relay Module Mount.