I'm going to try one more time to see if anyone knows this story before giving up on believing I read it.

It's a GEN story where Dean thinks Sam died in the explosion of a convenience store.  It isn't a coda but I do know it follows the path of an episode and I think it was IMTOD or Everyone Loves a Clown.  Dean ends up sitting in his motel room when a knock sounds on the door and it ends up being Sam.  He was out back of the store at the time of the explosion and was thrown into a dumpster and was unconscious when found.  When he woke up at the hospital, he had amnesia for a few days before remembering everything and knowing he had to get t o Dean right away. 

I've checked all the relevant tags here.  I also know the story IS NOT  Long Way Down or Gone.  If you have any ideas, I'd appreciate it.  This story has been driving me nuts!

EDIT:  FOUND!!! COMMENT SECTION HAS THE LINK.   I knew I didn't imagine the story.