I've done a quick google, there are some ok photographers there
This place
are ok, but their images are all B&W. That makes me think they can't work in color.
This place look quite good, but they tilt almost everything. I really don't like that. Worth considering though, nice photos and you could ask them not to tilt. Edit - damn wrong link, can't find them again.
Edit - Gina Smith is a kiwi living in Phuket, but her images are only average. From what Bobby said below she's dishonest, and the images on her site are only average.
I looked at a bunch of others, but the standard overall is quite low. Many look like people who grabbed a cheap camera, read a book, and started doing it - and some skipped the book.