This is how I make our sparring sticks. They make for good sticks, more durable, weightier and more absorbent then the commercial padded sticks we've used. For sparring we use these, MMA glove and headgear w/ masks. Get a few bruises, but nothing too bad.
Other sizes and weapons can also be done
http://innovativema.ca/forum/view.php?pg=sparstick
Other sizes and weapons can also be done

http://innovativema.ca/forum/view.php?pg=sparstick