I am looking for maps for Heroes III.

Good afternoon. I wanted to know if there are any maps (for Heroes 3) where: 1. The hero essentially has only one castle (you can't build in it), and he goes through the entire map... with few units, and you have to somehow manage. 2. On the map, the hero has only one city (there are no other cities). And the opponent has one city, and the map can be any size (large or small), and there is a way to complete the game in Heroes. 3. Are there any maps in Heroes that are like Dota? If so, could you provide a link to download them? I would be very grateful. Thank you.