Ah, my hardcopy of the 3057 book is not the revised edition but looking through the pdf of the revised that I just got it all of the IS warships it lists are introduces 3057-62 and the Star League warships seem like most if not all were either were destroyed or left with the Exodus fleet, and of those, if they were not destroyed on the way or in the in fighting afterwards, they were refitted and serve with the Clans. Even the Lost section is about the same. Needless to say, I am still confused. Were warships just a super rare thing during the late Succession Wars? Sounds like most if not all production had stopped with ComStar the only ones with the tech to theoretically build new ones but they wouldn't share/sell the tech.
I did end up buying a blister of a Baron-class Destroyer (Lost) and a near complete boxset of BattleSpace if for anything for the collection and fluff.