I found a website of Voice of Khmer Kampuchea-Krom Radio at:
On it's front page they announce:
"Broadcasting every Friday night from 9:00PM to 10:00PM (Kampuchea-Krom Time) on Short Wave 15,690Khz to Kampuchea Krom and South East Asia. "
Elsewhere on the web site they claim to broadcast from Washington DC and give a contact address in New Jersey. As far as I can see, they call former South Vietnam as 'Kampuchea-Krom'.
73 de Pentti Lintujärvi
Webmaster of 1000 Lakes DX Page http://www.geocities.com/Colosseum/Park/3232/dx.htm
and dxlinks.com http://www.dxlinks.com/