Like with the Cardassian Galor Class Cruiser's Spiral Wave Disruptors, I would like to see the Thermionic Torpedo Launchers of the Tholian lockbox and lobi ships added to the dilithium store. It should be possible, since they are non-unique.
Some players may want to use them for both front and aft sections of their ship, or even make torpedo boats out of them, which I do not advocate. They may also want to outfit multiple ships with them, without having to go through the pain of acquiring multiple Tholian vessels.
They should still be available in the store if only to reclaim a launcher if you delete one accidentally. Same goes with the Tholian Widow fighters. There is otherwise no way of getting them back except deleting your ship and unlocking a new one, which is stupid.
Plus, you can only have 1 per ship, but why can't you have 2 ships with 1 launcher each? If people want to pay a modest dil cost to get another launcher to save time at the shipyards, what's wrong with that.