Have you considered the SIT TESOL Certificate? In Thailand there are a number of options from these guys: http://www.auathailand.org/sit/
(disclaimer: I don't personally know these people, but they are offering the same course my Institute does)
This course is similar to the CELTA - externally assessed, 4 week intensive (very intensive!), and it involves a practical teaching component.
As far as TEFL International, I would not advise anyone under any circumstances to take a course from them. Read that blacklist link carefully.