Holstein cows for milk produce buy request - Afghanistan

Dear sir
we are a group of traders and looking forward for the perfect source of Holstein cows across the world,
We have planned to establish farms of Holstein cows. and start new business in this field, here in Afghanistan.
Now we need to buy Holstein cow so can you supply dairy Holstein cows for us
please assist us to find of the really source of Holstein cows across the world.
Your earliest response and cooperation with be appreciated.
Thanks