TwistedGray
El Jefe Brewing Company
If Jim was making beer 2+ years in to the apocalypse he was probably maintaining live cultures some where. As for where the survivors are going to find these things, that's going to be harder. But couldn't they just go back to Jim's brewery. They didn't go that far. But I guess that's a plot for next season.
SPOILER ALERT
I think you missed the part where his "yeast cake" when up in smoke when the truck was shot up (blew up? I forget). What's a little confusing is where Morgan got the beer from at the end of the episode though if not from that truck. I don't recall the 18-wheeler being in a drivable condition.
Anywhoot, I think whatever Jimbo had left over is gone now, no?