Hit a hole on a dirt road, need those little plastic clips part number

Hi everyone,
I hit a hole going too fast on a forest road this week and it pulled the plastic clips and metal screws retaining the plastic "plates" under the front 2 (?) feet of the car under the bumper.

It's holding on with tie wraps, but I'd rather try to make it look nicer.

I think I need something like this: 30pcs Bumper Retainer Clips Fasteners Ref 52161 02020 for Toyota Lexus | eBay ,
but I'm not sure what diameter is needed.

Does anyone have a parts list?
thanks

 

bumping in case someone has that information.