Just made my own! Total cost was about $30 with the most expensive part being the actual clover clamps.
I bought the clamps from www.wwlhardware.com
, he actually sells hardware for making your own toys! The rest came from a local hardware store.
Here's a quick DIY:
12" dowel rod, 3/4" in diameter
8"x1.5"x1/4" wood board
2" metal spacer, 1/4" diameter
#8-32 12" metal rod
2 clover clamps
If you look at a picture like the one posted in this thread, you can pretty much figure out how everything goes together. All you need is a drill and a little patience and voila! I'll post some pictures of mine when I get a chance. I would like to paint it and make it look a little more professional before I go showing off my homemade toys.