I recently picked up 3 Raaco Parts Cabinets at a garage sale but there were no separators included.

This design fits the Raaco 150-0 parts drawer.

Warning

While I'm comfortable with the risks of static electricity from PLA, you should verify that you are before storing sensitive electronic components using this separator.

Edit 10 May 2019

Due to variations in my print bed, I found some variation in the fit of the separator compared to my first test pieces. I have now updated both the FCSTD and STL files to be more forgiving while still fitting snugly.