I went through a similar struggle. I had very little breastmilk and then when my son was 7 months old my husband died and in the midst of that my son simply refused to nurse. He self weened and I was struggling to find a way to feed him.
I wanted to find breastmilk and went to a breastmilk bank but did not qualify (can't remember why but something about not being ill), wanted to avoid soy (check out the link below) and wanted to avoid sugared formula (not possible on 2001.)
Check out this site that explains the dangers of unfermented soy which is what is used in formula:
Soy Alert—Soy Infant Formula - Better than Breastmilk?
I truly hope you find what you are looking for. Your quest is noble. We really need to make an effort to develop an answer to this need. You and I are not the only ones. I'll be holding you and your DS in my heart with the intention of believing you will find a good solution.