Atomic Aquatics make an inline octo that comes with three different fittings so that it can fit the majority of the BC's manufacturer's corrugated hoses and LP hoses.
Ditto that. I use the Atomic SS1 and am very happy with it. Per AA's website, the SS1 will fit "virtually every popular brand (and some that are not)" BC via the set of adaptors that comes with it.
Cressi is certainly a popular brand.
In addition to the streamlining effect of one less hose to deal with, I really like the fact that I can unscrew the SS1 off the hose and carry it separately. Makes it easy to rinse and keeps it a little safer when I travel. Comes in steel or titanium, btw.
You can check with SB member darcyatomic, AA's inside sales person, or give them a call at the number on their website, and they'll be able to confirm either way.
I just went through the same issue only the other way around. I was looking to buy a Zeagle travel BC, the Zeus, and wanted to make sure my SS1 would be able to fit it. In my case, I checked with Zeagle, and yeah, it was no problem. The Zeus should be here next week. Can't wait!