I needed a clip to fix a plastic sheet in my garden, and found a broken  one on the floor, scan its face and modeled it.

I recomend you to print it in batches for best efficiency 

I'd recommend to print it in PETG as it is for outdoor use and is subject to slight deformation

Print with no infil and with enough walls so that the legs has a gap in it for flexibility and nice fit(for me it was 2 walls at 0.4mm width)