The Hutch freestyle canti brake systems (front and rear as rimspoke indicated) were never a production item unfortunately so finding a set for sale is basically impossible. The brakes were built using Suntour XC roller cam brake components along with several custom pieces that were fabricated by Bill Grove (Titron) who was the brains behind all Hutch component designs at that time. installation of the brakes required welding canti mounts onto the frame and fork as well. The member rimspoke is referring to is Tom Gass who does in fact have the brakes in question and is very tight lipped about the details for fear that they would be reproduced.
Johan of JJRBMX has some great pics of the bikes and brakes owned by Tom Gass here... Hutch Freestyle brakes