If you don't mind transferring at another airport, why don't you try GA? It is guaranteed AVOD PTV all the way. The CGK - DPS leg will give you an option to fly a wide body A333 as well which is also AVOD PTV equipped in all classes.
GA website quotes BKK - DPS - BKK only @ USD 460 per pax for adults and @ USD 344 per pax for children plus surcharges.
Thanks UMD. How is CGK for transit?