Maybe try Bangphra?
About 10 years ago I managed to find a school there, not far from Bangkok. Couldn't self-hire but got an instructor to sit with me in a C150. Very interesting field as wires at one end and a mountain at the other. At first attempt to take-off the brakes wouldn't release. After a bit of shoving and rocking they freed and we went again. Downwind leg was interesting as the mountain was coming towards you quite quickly. You definitely never extend! (HS-ATD C150 Captain Piya - from my logbook).