Focalprice.com OEM-size battery $4.15 free shipping
Just found this searching for SGH-T989 battery and sorting by cheapest price. I hadn't found any non-oem batteries before today, so I think it's pretty new. A good emergency battery, but probably not close to 1980mah. I have bought from focalprice before, and they're fine. It sure beats $30 for a stock battery
Forgot the link!