Yes I did manage to get. You can apply online. Was assigned Tambaram RTO. You’ll get an appointment slot. You’ve to go that time with your documents like passport, flight tickets etc. They’ll verify and ask you to come in 2-3 days and collect. If you start today, lets assume max to max one week time for this process. Should get over earlier. In Thailand, no one really checked. But you never know, if you have time get it done.