Well, I have tried searching for this on previous occasion (believing it exists) and found nothing, having typed in 'labyrinth minimap' which avoids the 4 letter minimum and this thread appears alone. However u can still use this thread (below), all crdit to poster. I personaly used this to gain all my knowledge of labyrinth, which is pretty decent!
If u still can't find anything thats of use just try searching for 'Labyrinth' on search. Have fun!