My name is John and I am looking for a map and lake chip for Lake Martin, Alabama for this unit. the unit is onlt 5 years old but the chips I have do not include Lake Martin cause the chips were small and they left the lake off due to the size. Chip has to be pre 2009 and be 1GB in size. I would appreciate any help in finding one or help in any way i.e. where to look for one. Thank you for your help.
john