Hi Frank,
If you have found someone who can change out the dial in the meter assembly then your best bet is to go to this website
Electronic spare parts online catalog for Toyota Land Cruiser. Toyota Land Cruiser engine, chassis, body and electric parts.
toyota-general.epc-data.com
and select your Land Cruiser, where you'll be able to find the part number for your speedometer assambly. It'll probably be in 'Electrical' then 'Meter'. You can then google the part number it to see if you can find a KM/h dial. Or you could try Amayama who will send if from Japan/ UAE.
Hope that helps
N