Temporary insurance for chile and argentina
 

Hi,
i'll go to santiago de chile next 16 december with my motorbike. I need a temporary insurace (max 1 month) for chile and argentina. It's posibile to to the insurace directly in santiago airport ? Or it's better to do from home, but spending too much money ?
If so, could i've the name of the companies in airport ?

thanks a lot

S.