I bought some of these SAS caddies for my Lenovo SA-120 drive bay. Unfortunately, the side clips are very fragile and I had a few broken just pulling the drive caddies out of the box. I took some measurements and replicated the clips pretty well. I'll be honest, they don't stay in the caddy super well, but they were plenty well enough and I was able to use these instead.

For mine, I printed them using Cura's Ultra-fine quality setting (0.06mm layer height) on a Makergear M2 using Hatchbox black PLA, no infill, no supports. I also printed them ultra-slow at about 20-30mm/s. They came out well enough for me.

Hope they work well for you as well!