Procurement of Yucca, a Biological Plant for a Research Study in Water Treatment?

Ammonia contamination in water and its removal is a big concern of environment in today's world. I am working on ammonia removal techniques in water treatment. Currently, on a special Turkish Zeolite Clinoptilolite along with Zeolite 4A. I am in need of a biological material Yucca which have been found by some researchers helpful in ammonia control. Can any friend help me to provide this material Yucca as I  am not able to get it in my country.  Regards, Lokesh Kumar, Chartered Chemist Delhi Jal Board  E-mail: lokeshdjb@gmail. com