What you saw in the movies, such as Bloodrayne, etc., isn't going to work.
Even if someone were skilled in the use of tui-fa / tonfa, it's a different set of mechanics. For one thing, blocking with the tui-fa / tonfa is done along the long end of the weapon, and that long end is resting against the forearm of the user. The bluntness of the weapon allows you to spread out the shock and kinetic energy over the entire length, and not focus it into one area.
If you're going to use a bladed weapon to block, you're going to focus all of that kinetic energy onto a much narrower surface, resulting in what could be a very, very painful block to make. Either that, or if you attempted to block with the front end of the weapon, such a strike could easily tear the weapon from your grasp.
Striking with the tui-fa / tonfa is done by spinning it around its axis. The blade you linked above, cannot take advantage of the spinning part, since the blade is facing downward, and that all you would be doing, is hitting someone with the flat of the blade. Not very efficient.
If you want real weapons training, I strongly urge you to find a formal training school, such as a fencing school, a X-kan Ninjutsu organization, a Japanese Sword Arts school (Iaido, Kendo, or Kenjutsu), or a dojo that teaches one of the respectable styles of kobudo (Yamanni Ryu, Matayoshi Ryu, and Ryu Kyu are the big three, although there are others), all under the watchful eye of a competent instructor.
You'll learn things far more quickly than you can on your own, and do so far more safely as well, not just to others, but also to yourself.