Virtualpersonal's BEST GIFT OF ALL (story and several sequels) for your #1. Names used are Sam and Dean, but might as well be J2; story is very AU, although hunting is neatly interwoven (not a main focus). Plus: great Christmas scenes!
Summary: Sam runs away from an abusive relationship, taking his daughter with him. On the road and trying to get as far as possible on limited funds, his car breaks down. Against his better judgment, Dean, a mostly retired hunter and the town mechanic, offers to let them stay with him until repairs can be made. Hurt/comfort, schmoop, domestic fic, X-mas, HEA.
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Summary: Sam runs away from an abusive relationship, taking his daughter with him. On the road and trying to get as far as possible on limited funds, his car breaks down. Against his better judgment, Dean, a mostly retired hunter and the town mechanic, offers to let them stay with him until repairs can be made. Hurt/comfort, schmoop, domestic fic, X-mas, HEA.
http://virtualpersonal.livejournal.com/254403.html?mode=reply