Mounting Fender Flares - what keeps them in place???

[Corellian Corvette]

My 2002 4.6 was missing one of the rear, lower fender flares (#2 in this diagram)

https://www.realoem.com/bmw/enUS/sho...diagId=51_4722

There are holes in the standard wheel arch plastic where the tabs on the new part go, but there doesn't seem to be any way to "fasten" them to the plastic. There is a screw at the bottom, but otherwise it seems like they would just fall off.

Am I missing something? Is there a clip or some other retainer I'm missing to mount these?

EDIT - I've answered my own questions. There is a mounting kit that supposed to go with these; clips don't appear to be sold individually. PROBLEM is that the set is backordered with no ETA. 51-11-7-073-517

So the next question; anyone know if these clips are used on some other car, that may be available individually?