Hope this info helps someone. I received my DTV successfully a few days ago from the Thai embassy in Jakarta, Indonesia (took 4 days) using Muay Thai Fever Gym in Chiang Mai (B15,000 for 6 months -1 private lesson per week[or fewer months if you choose to have more lessons a week, I guess]). Derry (the gentleman who does the admin) turned out to be extraordinarily thorough in doing the paperwork; he provided everything necessary and the embassy only looked at a few of the documents. The gym also has champion š instructors, really really positive people and very good equipment. š 10 mins from Nimman Hemin Rd.
Jakarta was full of really nice and friendly people who bent over backwards to make sure I was OK/happy; people in the embassy, restaurant workers, taxi drivers, kids in the street saying hello to me and giving me hi š 5's. Only downside was the pollution. It was also very cheap to stay there. I stayed at 'Ameera Inn' for 6 days (B2,000).