Thanks, I just saw this and it may work rather well for what I need.
Xue: I'd advise against getting that padded wooden dummy belt. We have one on a dummy at my si-dai's house and its pretty cheesy--with little thin pads. It's just enough to make hitting the dummy a little safer, but not enough to hold up to a lot of hard, repeated hitting. They are sold to Wing Lam by my commercially minded former Si-fu... need I say more?
Instead, I'd go back to the Wing Lam webpage and click on "Training Tools", then go to "Miscellaneous Training Tools and Aids", scroll down to the very bottom of the page and check out the "Striking Bags" available in 1,2, and three compartment models, priced from $14.99 to $20.99. These are the standard canvas wall bags, meant to be filled with rice, beans, sand, etc. for striking. I bought a new one a month or so back and it seems to be of decent quality.