They sell pastured bacon at the Encinitas farmer's market on Sundays 10-2 (or so). I don't like it as much as regular bacon -- much less fatty and it's cured very subtly... not enough salty/smoky flavor for me. But it's healthy!
@ Todd, your post is from 2010, but maybe you are still interested in it.
In La Jolla is a great butchery called "Homegrown Meats" it is specialized on grass-fed beef and they sell a super delicious bacon there.
Not just the bacon is good, also the meat.
The butchery is not close to my place but I invest the time and drive there every week twice.
Bacon!! To eat or not to eat? 9 Answers