I am sorry I can not write any long post now, as I don`t have the time.
Will try later. ( I am a veeery slooow typer also!)
The Bentonite, I guess, is not available.
I do belive, that your country allows you to buy it from other
EU-countries, for 3 or 6 months use.
Holistic Horisons(??),, have address in England, so I guess/hope one can buy from them (even if it is shipped from US)
They have products used in cleansing, hopefully Bentonite as well.