hey,
rivers end has it listed as Panama berry. They are in texas and ship plants

Here is a link that might be useful: rivers end

Thank-you Plummy for you help. Regards,susie

I think they have some too..

Here is a link that might be useful: http://www.nativehabitat.com/

Hi Susan
I saw that plant(Trung Ca) while vacationing in Montreal last month.It is being sold by a Vietnamese named Mr Phuc
please check his web site which has many tropicals and native plants to Viet Nam like Mai tu quy,Mai chieu thuy,Nhat chi mai,Su Thai Lan,v.v It's www.floraexotica.ca
Good luck