If you are looking for comprehensive listings for product information try the American Printing House for the Blind, (APH) a Federally (United States) funded agency providing products and services to blind individuals in the public schools. APH is a large, complex organization with many resources for blind people. For another comprehensive listing of product suppliers try Vendors Specializing in Technology for the Blind. Also, there is a Yahoo group called "Bought and sold by the blind.
The HTTD was invented by Vance Lankford who used the system (after consultation with physical therapists) to successfully teach his own students to walk with a heel to toe pattern. It is always used with the permission of a physical therapist to make sure it is compatible with each student's physical circumstances.
The HTTD is designed to fit a specific student's shoe size, although it is adjustable. The current cost (2003) for the HTTD is $49.00.
Contact: Vance Lankford at these phone numbers: 325 659 0484 and 325 450 1384, or email him at: ekejv@juno.com