Prius(2008) firmware

Hello forum members.
I drive prius 2008 (20th cousin). In the car, the fuel use is showed as (MPG) and temperature is showed as (F). This is not a suitable for us, however, 100km / l and C standards are using in our country. Depending on my investigation, to change settings to our standards, chip’s updates needs to be installed. I have a programmator but I can’t find a necessary updates for Europe or Canada. Could you please, tell me where I can download this updates, thanks in advance.