I called the 800 # for Orthoamerica (800-637-4500) who makes the product. They told me to just look under Medical Supplies in the yellow pages and call around until I could find someone who sold it.
I did find someone who sold it--it was $79.00. I will go take a look at it.
However, I also called Biodex (800-224-6339)--They are going to send me a catalog with their night splint in it. They want $45 for one with a 90 degree fixed angle and $55 for one with an adjustable angle.
Thanks to Debra who posted the 800 # and the info about the Biodex splint. It sounds promising.