Unfortunately, here in Brazil we have no Akadama, no Kanuma.
But...
We DO have something that the seller calls "Brazilian Akadama":
www.idealbonsai.com.br/akadama-nacional-...03-a-06mm-2kg-p2212/
AND...
Following this link (that uses cat litter as bonsai soil,)
bonsai4me.com/Basics/Basicscatlitter.htm
I also have found an Argentinian lava soil from Patagonia that is sold in Brazil as cat litter. People say wonders about it... Testing it on some cuttings:
www.solminerales.com.ar/gatos_sanitario_standard_absorsol.php
This link above is in Spanish, and the first one in Portuguese.
So, how many people here use cat litter as bonsai soil? I am curious!

I guess is better opening a new thread with this topic, right?