Check out this thread on a another Board which says that Phalanx 1B are the only CIWS that will be fitted from now on.
http://p073.ezboard.com/fwarships1di...cID=6122.topic
and as biggus states that they will be all reused & update versions (total upgrade was said to be about 16 max i.e 8 ships worth
this is the whole fleet not only the T45's)