I was on the same boat, but the opposite. I am in US and just bought a NIB BMP module from a US seller. Unfortunately for me, the seller sent me BMP type M054 which is EU version. I managed to dld and install the latest NA map package via CM. I did save the EU map package in case I need to restore the module down the road.
I assumed there is more than just the map files to make the NA version to function properly in your region, as it does on mine.
According to BMP Tech Support, it is impossible for the BMP to read data from another region other than the region where it is originally built for. Now I know, lesson learned