How do you feel about mpreg? The lovely obsidianromance has a great mpreg zombie J2 set of stories....
http://obsidianromance.livejournal.com/23341.html Summary: Four years after the zombie epidemic takes over most of the planet, Jared and Jensen are able to make a life for themselves. Until they fuck up and Jensen gets pregnant.
http://obsidianromance.livejournal.com/25605.html Summary: This takes place three months after Blood Borne (which you should probably read first) and Jared and Jensen have to deal with the very real possibility that zombies aren't the only thing that can kill their sick son.

I really don't like mpreg but I read the summary and decided to give it a try, it didn't disappoint me :DD it was pretty good! thank yooou

Have you read THIS (http://masterlist415.livejournal.com/126140.html)? It's a newer one and awesome

that was sooooo gooood! muchas gracias :)

I'm not sure if this is on the list or not, but it's really good.

http://frostian.livejournal.com/147824.html True Night

Summary: Jared and Jensen take a road trip to Seattle only to witness what looks like the Apocalypse overwhelm the city. They manage to escape to an island only to discover the situation on Santos to be worse than Seattle. But they cannot leave, as the infected roam freely and the military has set up blockades around the island. Faced with immeasurable horror and growing desperation Jared and Jensen plan an escape, not only to save themselves but the sick who are quickly turning into homicidal psychopaths