Well, I don't know about laws in your neck of the woods (do check them at all times, please), but here where I live, hex maps with dots in the middle are not specifically T2K related, nor is the 10 m per hex scale intellectual property. I think, once you drop their name or the name of the game, you'd be in for royalties, though. Of course, it would be polite to talk to FL, when planning such a project. I don't know, how they roll, but they might give you their ideas and you give them yours and in the end you know their boundaries and then you decide if you call it "T2K maps" for a price or just "10 m scale hex maps".
Really, this seems to me something you don't talk about on their official board, but with them via email.
liber & infractus