Thw wooden ones were used for training.
All you need to make one is a 70 * 15 cm (27 * 6 inches) piece of wood with a thickness of about 2 cm (0,8 inches), a saw, sandpaper and the stencil.
Step 1: Print the Stencil
The first image shows the stencil when it's out together. The other three pictures should be printed on A4-pages (A4 is about equal to the letter format in the US), then glued together and cut out. Don't forget to cut out also the space for the handle!
Step 2: Do It!
After that, use the sandpaper to smooth the handle and the "blade". Of course, all this is much easier and faster with a grinding machine.
Unfotunately, I made no pictures during this step, but it is not that difficult.
Step 3: Finish
You can find a short video (4 seconds) of a Dussack fight on the bottom of this page: http://www.pax-et-codex.de/technik.html#dt.%20schule (it's the third video).