Though I am a martial artist, I also participate in a game/sport called belegarth in which we use weapons made with solid cores and foam padding. It is a full contact game, with the only target not allowed being the head. Though this is a medieval type game, the weapons and equipment we use could be used for martial weapons training just as easily. Check out the available selection of weapons at Edhellen weapons. There are also tutorials on how to make them yourself out of simple materials. If you have any questions please feel free to ask, I would be happy to answer them.