You can see a retail listing here:
http://www.samcoglobal.com/ammo.html
Also, as it notes, the wooden bullets can still penetrate and caution should be used. I would also be catious of the bullet splitting or fragmenting into slivers in air, so make sure a good field of view/aim is open before firing, even to your sides. It might just be better yet to pull the bullet, and reload with the same powder but with a new bullet just to be on the safe side.