looking for bulk organic amendments

I'm looking for large amounts (40-50 pounds) of neem meal/cake, karanja cake, and crab shell meal. I was wondering if anyone knew of any local suppliers of these products. I'm located in Grand Rapids although I'm willing to travel for them if necessary.

MOst of that stuff I just end up having to order over the web. I have not found a place to get bulk neem or crab shell.

It might pay to visit the Nurseries and Feed/Farm stores as often they can order such in bulk even if they do not stock such in the first place . A wise owner will do whats necessary to obtain such for you if possible and they usually have access to everything in bulk if they have diverse suppliers .