Bumper too wing help!!

So i have removed my slighlty scabby front wings and replaced with new, and my non-genuine clipper bumper with a genuine one. A

ll painted and on waiting for arch extensions to be bonded on. Issue i have is the gap between the wing and the bumper, there is a lot of movement of the bumper where it wraps around the car over the wings.. I dont know if when the arch extensions are fitted will this firm things up and keep the bumper in place? Or do I need to get something made up that sits between the wing and bumper like a rubber bush or such like?

When i removed the non-genuine bumper it had a similar thing moulded/bolted into it. One of which i managed to remove the other not. The one i did remove however was been consumed by the dog.

Anyone experienced this or know where i can get, if i need, such a thing?

Cheers