iirc Vaaish stopped that ordnance* project because of it being not really worthwhile in terms of cost/production.
What you could do for Helios is this:
Have the main kit and have the website show options for that ship, so if you buy a cruiser offer the option to add a pack of torpedoes or fighters/bombers for xx price.
Just as C&E has the option to include a base/stem for xx price when you pick a ship.
* An ordinance is a municipal or county law. Ordnance is a mass noun referring to military materials such as weapons, ammunition, equipment, and vehicles.