Does anyone know where I can buy Bagua bag? It's the kind of cloth bag used by Feng Shui masters, with a Bagua diagram on it.

The kind of cloth bag used by Feng Shui masters is called green bag in ancient times. You can make it yourself with a piece of cloth. It is best to be dark green. If you need it for packaging, it is recommended that you bring a walking stick and write "Dragon Hunting Stick" on it.

You can refer to the picture of "Xu Xiake", his image is that of a classical Feng Shui master.