Accepting map submissions.

I've been looking for a map, but haven't found one yet. I need an xxxL or xxL map for up to 4 players, with castles in different corners, preferably an island map, a large number of resource mines, a large number of artifacts, and strong enemies on each player's territory, for a long game with simultaneous turns without overlapping interests, and a meeting point in the center suitable for players around level 25-30.