First time I was unable to find something I needed in Maker World. Located the pet collar clip on printables.com by Not Schaf-fer Work (@JeffSchaffer_1071638). Removed some excess material from the original design and flipped it on it's side because I was worried about the overhangs failing without supports. Both vertical and horizontal orientations are included in case you have issue with the overhangs. I printed using PLA Basic and it has held up fine for several days now. Clips are 12.5mm (½") spacing. Pictures include original clip in black, and printed version in gold.