You can buy a few selected ceiling fans in Thailand but it is not much. If you want some fancy like Montpellier a fan from the farreys.com/Ellington fans series. Then you have to order from the internet or buy abroad and bring back to Thailand.
I found the Tahiti fan in Thailand but I am not sure about the quality of it or if it is an import from the start. If you want to buy imported fans it is better you order them online yourself.
The hunter fans look really cool if you want something for your beach house or summer house. They really look from an Indiana Jones movie.