Inherited an old toolbox from a family member and it was missing a few of these to prevent the drawers from sliding out all the way. So I took one of the existing ones and modeled my own replacement. Works very well so far.

The clip itself is approximately 2 inches long, 1.20mm thick, and 4.7mm wide.

I highly recommend printing this in something like PETG or ABS. Needs to be decently strong, but also resistant to warping at higher heat if kept in a hot garage, workshop, shed, etc. PLA might not work, but it takes less than 10 minutes to print one of these so not a big deal if you try and it breaks.