Replacement Clip for IRIS Buckle-Up Box

This is a replacement clip for various IRIS Buckle-Up boxes sold circa 2010, of which I have many, most with just one clip. The specific model I have doesn't seem to be sold any longer (see pictures for details), and newer ones have different clips, but if you have the same style sitting around and need a replacement (or ten) this print seems to do the job.

After many, many iterations PLA, carbon fiber PLA, and PETG all appear too brittle for the stress of attaching and operating the clip, no matter what orientation I print in. This final design in ABS, printed vertically, was the winning combination. ymmv, of course.