If you want them so badly, you're welcome to make them.
But I stand by what I said, civilians and escorts don't need to kill Gunboats. Escorts might have to fight them occasionally, but only long enough for their transport to escape. It's not a civilians job to fight pirates and terrorists, especially in gunboats.
And it's not too hard to kill gunboats in fighters. We used to do it with 2 eagles and a switchblade.