BoJohansson from the russian SUKHOI forum made the french "ARRAS class" sloop (gunboat, corvette). See the first ingame screenshots of this ship:
He made some special french guns and depth charges too. I think, it's a "must have" for the next version CCoM 10.2. As these sloops were used by "Free French" too, we can see them during the complete campaign.
rowi's Download Site