Hey there. It's an older requst, but maybe you're still interested:

I got a (short, sadly) fic for 3.
The first Christmas together (http://calamitycrow.livejournal.com/3190.html#cutid1): Dean gets custody of a kid he didn't know he had

And for the AU, though they later still end up hunting, but not from the beginning:
Relative Gold (http://www.fanfiction.net/s/5759954/1/Relative_Gold) AU. Dean's life goes in a whole other direction when Sam supposedly dies at age four. But while on the Shooting Team in the 2004 Olympics, Dean meets a tall, shaggy-haired swimmer. Can the yellow-eyed demon be far behind?