Try this trick for a quad of Hercs with all the trimmings.

From the main menu, start or resume a campaign. Return to the main menu and select Single Mission. Choose any mission, enter the briefing, and click on Armament. Select a Herc, then return to the briefing and cancel the mission. Resume your campaign and play the first mission, then Save. Load the saved game and you'll find your Hercs loaded for bear and ready to party.