Was Elohim the Saviour and Redeemer of his world? According to Mormon doctrine, God the Father (Elohim), once lived a mortal life.  


  “As man now is, God once was; as God is now man may be.”  ( The
  Teachings of Lorenzo Snow, ed. Clyde J. Williams [1984], 1.)


Years ago I remember being told that God the Father did not live simply as another man, but that he was in fact the Saviour and Redeemer of his world, much as Christ is the Saviour and Redeemer of ours. He lived a sinless life, like Christ, and suffered for the sins of all his brothers and sisters.

I confess that I've never bothered to look into the sources behind this claim, but now I'm wondering, who said this? Which church leader is credited with revealing this?

I'm not necessarily asking for a canonical LDS source, I just want to know where this claim comes from, be it Journal of Discourses, a letter, hear-say, or wherever.
This idea actually dates all the way back to Joseph Smith.  I've been able to find a couple different quotes from him that touch on the subject, from a couple different sermons he gave:

As the Father hath power in Himself, so hath the Son power in Himself, to lay down His life and take it again, so He has a body of His own. The Son doeth what He hath seen the Father do: then the Father hath some day laid down His life and taken it again
-- History of the Church 5:426
I want you to pay particular attention to what I am saying. Jesus said that the Father wrought precisely in the same way as His Father had done before Him. As the Father had done before? He laid down His life, and took it up the same as His Father had done before. He did as He was sent, to lay down His life and take it up again; and then was committed unto Him the keys. I know it is good reasoning.
-- History of the Church 6:373