What about InWall AP? we have map lite, cap lite with the same board, mb to make based on this board? it can be the ideal solution for places where we should wired network by wifi.
there are some solutions from ubiquiti and zyxel, but the "perfect" idea is in noname china ap's - they have also phone jack. smth like this^
https://drive.google.com/open?id=0Bxq9Y ... 2IyeEFkY0U