Are there special plastic mounts for the 4" speakers in the rear deck similar to the plastic mounts that the 6x9's sit in? I am doing a complete new install, and when I tore everything out of the rear deck, I notice 2 extra holes for 4" speakers. I may as well fill in those holes with sound if they are there, right?

Anyways, does anyone know if there are are specific mounts. If so, I may have to take a trip to the wreckers. Any help would be appreciated.

Thanks.