G'day yerself,
http://www.loxinfo.co.th/ excellent tech support in English & Multiple POPs all over TH.
Buy the starter kit from any dealer in Pantip Plaza, not expensive, and use Eudora Pro (FREE) if not already installed.
Singapore has similar startup kits available but I have no experience with them.
For VN, I suggest you contact Slasher.
I hope this helps.