Thank you, Rachel for those links.  I had been looking online and hadn't come accross those yet.  I wonder if it would be worth it for me to try to compete with the ones already selling them...except maybe to do it locally.  I had already thought of contacting Dr.s offices.  I think I may be able to do them a little cheaper than most of those I saw, but I'll have to do some more research to be sure.  Thanks again for the information; it was quite helpful. =)

 

Lynn