YES YES YES!!!
By putting the SSGN's on different sides, and then setting those sides in alliance with ROE wartime, you can get over the restriction of the number of missiles in the air!!!
So, all you have to do is put each SSGN on a different side, and then provide a separate linking platform for each side, and you can get a unlimited number of missiles in the air for each target, based on the number of SSGN's!
Screenshots to follow. :|\