The
ICAO directory for PPL(H) training providers lists a school in Thailand, Civil Aviation Training Center:
http://www.icao.int/td/detlen.cfm?&WhichOne=10
http://www.icao.int/td/crsen.cfm?Course_ID=00010458
But I hope that your Thai is good. I can't seem to find an English version of their website:
http://www.catc.or.th/2007/index.php
Edited to add: Aha, found the English version. Looks like it's what you're after.
http://www.catc.or.th/2007/training/...copter_en.html
These also have a
CPL(H) module.
HTH