If you are in to tinkering around in the shop, you can make your own that are more than satisfactory. Just Google "Oland tool" for a ton of information. Seems that an old woodworker from Kansas by the name of Knud Oland developed the method. Here are a couple that I made and use, one with a 1/4" carbide core box router bit and the other an angled bit I fashioned out of an Allen wrench. The Allen wrench is barely hard enough - it requires frequent sharpening, but I only use it under the inside lip of bowls. Oland recommended high speed steel machining bits and I have a friend that runs a machine shop, but I just haven't had time to get some from him yet.
The shafts are 18" of 1/2" cold rolled steel available in most any hardware store, with a home-made turned handle and a 1/4" hole drilled in the end, shoulder ground to a point, and a small hole drilled and tapped for an Allen screw in the side to hold the bit. You can hollow a vase or urn to about 10-12" with little or no chatter, and the total cost for these two was less than $20 ($12 for the carbide bit).
It does the job for me and I don't have $120 or more stuck into a hollowing tool.
Last edited by woodduck99; 09-06-2010 at 08:42 PM.
Reason: forgot to add photos