I know what rubber grommets you're talking about, but they are not applicable to the A-Spec intake. On the OEM box, the rubber grommet goes around the metal collar and the bolt goes through the collar and then into the threaded mount in the engine bay. The OEM box fits
around the rubber grommet.
https://www.hondapartsdeals.com/hond...omponent=B++01
You can't do that on the A-Spec intake, and even if there were a grommet that could fit, the amount of "play" it would give the intake would be negligible.