Not really.
Would it be hard to make a standalone mod with just the ships? I'm a bit of a XIV Battlegroup fanboy, but having those extra XIV Battlegroup designs as rare ships to find would be awesome even if I wasn't.
I tend to be pretty picky with what mods I add and honestly Iron Shell is pretty lightweight as far as factions go. 99% of the time they just act like an extra force for the Hegemony (Like the Lion Guard for Sindrian Diktat) They also only own two markets in a single system so it's not like you'll be bumping into them all the time unless you're going into the system they own (or you try taking the Hegemony's pristine nanoforge)
If you really want the ships and only the ships then you'd need to edit the Hegemony faction file to add the Iron Shell exclusive ships to their roster (so the hegemony spawns them in) You'd also need to remove the files that tell the game to spawn Iron Shell faction stuff (like their markets, characters) which will probably require a lot of testing since you're gonna be gutting large amounts of the mod. It might cause errors in ways that would be hard to predict (such as the tax system)
I'm not entirely sure how to do all of that so you might need to ask others for help (for example, the unofficial Starsector discord's modding channel)
