Just a quick design I threw together to protect a recent eBay Purchase - a "AD584 4-Channel 2.5V/5V/7.5V/10V High Precision Voltage Reference Module". Unlike another design here on thingiverse, was the smaller square one, and there didn't seem to be any designs round for it.
The design I used seemed a bit too tight - didn't need to use screws to hold it in, the board needed a minor filing, and the print needed some minor trimming. So I resized it and made 1mm bigger, so that should hopefully make it more of a drop in fit if that is your preference, or you can use the original model ;)
Ran the print at medium quality, as it didn't need to be a perfect print.
Basically just measured the module up, and created a design in tinkercad. I wanted the bottom of the board completely protected, and the top half clear so as to not block access to the connectors. The built-in standoffs are there to ensure the protruding solder joints are not stressed. As my first model was a tight fit, I didn't need to use screws to hold it in place.
If you do a search on TinkerCad's website you should be able to find these designs there.