I guess its just a matter of finding the newer model masks.
I got this from Sly's website,
"Replacement ear foam for all generation PROFIT masks. Included as standard on all new PROFIT masks as of March 2011, this tri-layer
foam is 70% thinner and has a cutout for increased hearing."
They offer replacement ears which is what it is talking about. Note the part about it being standard on all new masks made past March 2011.
You can get the replacements here: http://shop.slyequip...de=SLYG3EARFOAM