General Replacement Rubber Gromit Under the Bonnet?

[Fiat Punto 2012 GBT]

Sometimes there's a rattling/vibration in the engine whilst it's running, I don't know much about cars of terminology so please forgive me. It seems to be due to the rubber gromit on the right side of the black box, when you push the black box down there is give and then the rattling/vibration stops. Tightening the screw doesn't fix it and I'm pretty sure the rubber has perished or compressed. I've tried to look for replacements (not knowing what its called) but I can't find anything. Can somebody help please?

 

[GrandePunto PL]

This is not available as a separate item (it's a part of the air filter box assembly).
But, other models have similar bushing/mount/gromet and it fits.
Air box will move more, but without making rattle.

PS
Pay attention to details. There is (probably) some damage to the wiring around ECU. Looks like it on the picture. Check it.