I asked for something like this earlier in another thread. I asked if it were possible to import ships as well. From what I understand, when a new game is made, the game loads all designed ships (at the time the game starts). However, it has no way to load ship designs made after that point.

Likewise, I would like to be able to import ship designs from other civilizations. I might have a good ship design I made for another civ I played during another game. However, because the ship design was made for another civ, that ship design exists only for that civ and therefore I must redesign the ship if I want it for another civ. I also don't usually care about apearances, so I'm fine if the imported ship still has the looks it had for another civ*.

*If appearances and function can be separate and changed independently of each other, then I could swap the appearance while retaining functionality. However, I'm a bit too busy right now to go into details of what I'm thinking.