There are a number of companies available that deliver carbons. And hundreds of qualities are available. Write down Your specs and send to a number of companies. If small quantities (
SA is for shure a good dealer but they don't have any production of their own.
TAke a look at at the homepages of for example Norit or Jacobi Carbon. There are also a large number of Chinese companies that deliver different qualities of carbons.
Micro porous carbon normally refers to the pore size of the carbon, other therms like Granular activated carbons (GAC), Extruded or pelletised activated carbons (EAC) and Powdered activated carbons (PAC) just to mention a few.
Think if You need bio-mass based carbons or coal-based carbons, the properties are different.