Case for an ebay cheap (and great) electronic components tester.
Diode Triode Capacitance Transistor Testeur ESR PNP/NPN got on ebay for ~8$.
You may check than dimensions are correct before print it.
There is many tester like mine on Ebay, and I don't know if the dimensions are the same as mine.
This was one of my first prints in PLA with warping (good old days).
There is no screw for the 9v Battery door but there is for the top and bottom case.
I took 'unknown' screws from my screw box :-D.
I prefered adding screws that allow (very :-)) bad print tolerances (See my photo).
About the door, you may have to rework it a little as I did the time I print the door.
I've put the sketchup file for that purpose. At this time, my printer was not very well calibrated.