Google Mityon Driving School on Suk in Pattaya.
They have a MB class 1000 thb for 3-4 day class. You retake the 50 question test till you score perfect, practice riding as they tell you, ride the plank and third day you take official 50 question test. With that paperwork you go to Land office and go through regular paperwork.
https://www.facebook.com/MityonDrivingSchool/?locale=th_TH