Anyone know where to find one of these outside of the big chain stores like SuperSports, because they charge 12,000-15,000 baht (when you can get them in other countries for less than half that)?

NOT the kind that you hang, but the kind that has a heavy base you can fill with sand or water -- like the one seen here.

Oh, and the more-resistant, heavier-duty, the better.

As you have now posted this in the Muay Thai and Mixed Martial arts forum:

http://www.thaivisa.com/forum/topic/668892-stand-up-punching-bag/

This one is now closed as we do not need duplicate topics running.