Stock S3 firmware link?

I need to unroot a sprint Galaxy s3 so I can activate it,  i need a link to a stock s3 firmware.

I have looked everywhere and keep hitting dead links. 

 

Kneeblock - 

Shouldn't you be able to just restore it on the device itself? I'm not an Android expert but whenever people talk rooting they say it's easily undone on the device. Phone Post


http://forum.xda-developers.com/showthread.php?t=1746680

This thread has everything you need brother. Phone Post

http://forum.xda-developers.com/showthread.php?t=2187081

One stop shop

gyakusetsu - http://forum.xda-developers.com/showthread.php?t=1746680

This thread has everything you need brother. Phone Post

Thanks Phone Post