It can be bought at Gearbest with free shipping.
小Xiaomi Mi4C 2G Memory，16G Capacity USD 239
小Xiaomi Mi4C 3G Memory，32G Capacity USD 275
Chinese Official WebSite
Check http://www.willmyphonework.net/ to find out if this phone support your carrier.
When choose shipping method, make sure do not choose Auto(Free) and add Tracking number (free for order over $40)
It is also recommend to add Shipping Insurance. So you can get full refund if the package is lost.
XIAOMI RedMi Note 2 LTE Only USD 162 With coupon