Umm sometimes its best to just bite the trend and buy an actual soap. Sure, you might find something, but most of it is just the same melt and pour that col conk and vanderhagen use.
Hell, there are "recipeis" for shaving cream online that are nothing but coconut oil mixed with canola oil and a scent.. There are others that are nothing more then coconut oil, shea butter, mixed with vinegar. I dont have to be a scientist to know that even modern williams is going to be better....