Found this lil place that gives free cardstock buildings, You might have to adjust to your scale, but they're free!
http://www.rpgnow.com/product_info.php?cPath=268&products_id=1865&
http://www.rpgnow.com/product_info.php?products_id=5983
http://www.rpgnow.com/product_info.php?cPath=268&products_id=1865&
http://www.rpgnow.com/product_info.php?products_id=5983