Mmmkay, here we go.
Go to a hardware store and pick up some wooden dowels (about an inch in diameter, maybe 7/8"). Also, get some copper tubing with the same inner diameter as the dowels. Make sure the dowels fit into the tubing without shaking around too much. Get some duct tape as well.
Go to a sports store, and get some lead fishing weights.
Go to an arts supply store, and get some foam rubber.
Cut the copper tubing to the appropriate length (total length plus about six inches), cut the dowels to the copper length minus about nine inches. Hammer down and fold over one side of the copper tubing. Put the dowel down the middle, add weights to the end until the desired balance point is reached (I like the end of the grip area). Then hammer down and fold over the end of the tubing. Cover with foam rubber, sealed in with duct tape, except for an area you'll use to hold the weapon. PAD BOTH ENDS. Add some grip tape to the handle, if you so desire.
Gloves and helmets are strongly recommended for spudding in practice. Aside from that, enjoy, and I disavow all responsibility.
Sometimes, we must consider the world works in ways unbeknownst to us.