I'm an absolute fan of the game, as said in the title.
Now I googled a little games like it, and this looks really curious. "Battlecruiser 3000AD".
Usually it's not that difficult to get various games, but it's usually a story to find something interesting with exciting game play.
There are couple of old games, currently in mind I actually hold Master of Orion 2 which are really grand, and it's really hard to find anything like of either the same age, or newer.
I often recall when someone posted here Bitcoin surpassing 1$. I was like, uh.. WTF is this shit back then. Oh well.