I've heard of using pee, but my family thinks I'm nuts already.
I found a bunch of amendments at Ace the other day - blood, bone, cottonseed meals, etc. Don't know if they are "not-synthetic-chemicals" organic or just "not inorganic" organic, if that makes sense. But you could mix your own if it suited, or at least price it out.
Have you read the Urban Farms fertilizer thread? It's awesome.
Tl