I had consulted Dr Charan Mahatumarat. He is known as the Jaw GURU of Thailand. He taught many of the FFS doctors like Chettuwut, and Supporn. He is the head of Craniofacial Surgery Association in Thailand. He charges just $4,100 approx for mandible reduction,contour, and buccal fat removal. Not sure how dramatic his results are, but he is popular among locals.
Chettuwut, and Supporn are much more expensive. There is another doctor called Dr. Nond, He is a craniofacial understudy of Dr Charan, drnond.com is his site. He does mandible reduction and contour at a price of approx $5,700 .
Another doctor many trans women have gone to for a low price is Dr. Pat from the Tokai clinic in Thailand. He has a website with his prices. $2000 for jaw reduction I think. I hear mixed reviews about his work.