The price of the Stanley dowel maker has gotten crazy over the last several years. One with a full set of the cutters will run you $1000+ on eBay and it is not unusual to see individual cutter heads priced between $150 and $250 each. Most of the listings come with just a single cutter (usually the 3/8" size). Heck, people are listing just empty cutter head boxes for $85-$125. At those prices, I have considered selling mine and getting the Lee Valley dowel maker.
--Nathan, TX. Hire the lazy man. He may not do as much work but that's because he will find a better way.