Farmers markets and, around here Zum available via amazon.
Pretty sure gracer’s not in the US.
I don’t think Europe has Target. I checked Dr. Bronner’s website, but for shipping you have to email them specifically so it’ll cost a fortune.
It’ll be something quirky & fun to find if I ever visit the US. 
Does Bronner’s site have a “store locator” button?
That’s how I found out about Target.
You can get THAT at Dollar Tree for, well, a dollar. I didn’t know that shopping at dollar stores was a Secret of Women. I thought us guys invented the store where you can get all manner of junk food and everything costs the same in units of one so we could keep a running total in our heads.
I’m surprised to find via comments above, that I’m pretty much on my own saying that this soap is disgusting. It may be environmentally favorable, but the only thing I found it useful for is cleaning my oven. It made my hair dull, flat and flyaway. As a hand soap, it caused a filmy buildup on my sink that I actually had to scrub off. The smell was repellant, so as for brushing your teeth with it - don’t even go there.
Being over-priced was not a concern, considering all it was reputed to do, but a good can of Easy-Off is cheaper. Sorry folks, I vote “no”.
And by the way, if you have enough time to read all the ranting on the bottle, you have too much time on your hands.