I don't know how many maps are out there at the moment, but I modified one that was originally posted here on the forums by Durakken. I added labels to the rows/columns and listed every system to the side alphabetically, along with a guide as to where they are. Durakken made the original map image itself so I'm posting this with his permission.
http://img692.imageshack.us/img692/1252/stomap.png