It is likely. Most small Asian Markets sell arrowroot powder. A large one like this should also. I believe i saw it here before, but it was a while back. I am unsure if they still do.
I don't think so, but there are herbal shops that may. Theres a couple in Detroit
Sorry.. I don't know coz I don't know what arrowroots are
Thanks! Your answer is awaiting moderation.