they also sell neem oil that is solvent free.
i have never used the leaves or really looked into the use of them.
there are other online soap supppliers that sell neem oil.
the only people i have bought stuff from though is the linked sellers above.
you will want to mix a strong fragrance with your neem soap batch.
plain neem oil can be kind of stinky. but the soaps i got were not stinky at all.