Where to find a map for Garmin Montana- Cambodia?

Any one out there able to help with where i might find a map that i can install on an SD card to my Garmin Montana for Cambodia?

Much thanks in advance to all that chime in.

Kindest regards,

Paul.

Open Street maps. Free.

http://garmin.openstreetmap.nl/

Paul,

Might take a poke at these too:

http://mapas.alternativaslibres.es/downloads.php#

Let me know how those work out for you. If they don't I may be able to brew something up for you.

Much thanks to you all.

Where would we be without the wonderful people of ADV.