TITLE WAS SUPPOSED TO BE RE EDGING QUESTIONS. I have no clue why it says re-ra???

i know this is a car audio forum but i figured i'd ask anyhow.

i just got a sweet deal ($50) on a velodyne 5.1 setup for home. and one of the 4.5" mid-woofers surround is cracking. It is rubber but my local speaker repair shop only sells foam kits.

how big of a difference in sound will there be if i repair the front pair of mids with foam instead of rubber?

or if anybody know where to get 4.5" rubber surrounds from send me a link.

thanks