Map for GPS

Hi,

I have been playing a bit with my GPS and Oziexplorer in preperation for
an upcoming trip to Kruger. I do have a list of the camp GPS coordinates
from the SANP website.

However I am trying to find a decent map image to use. I have tried
scanning some maps but somehow the results are not really usable. When I
calibrate the map with a few points, the others on the coordinates list
show up slightly off.

I do have two large format detailed maps of Kruger but they are just too
big to scan on an A4 scanner. Anyone have or know where to find a good
map as jpg?

Regards,
Hans