I just found this web site, which (I think) is a marketplace for a lot of vendors to sell their artisinal goods, called Art Fire. I used search term “soap” and refined it with “unscented” and found pages and pages of handmade soaps. Not all had ingredients I would recommend, but all of the soaps I looked at listed ingredients. I saw many that would work for the recommendations on Solveeczema.org, some that wouldn’t.
