Yes, I am fully aware that it's old school.
One of the lady who was a friend of Amish family, drops off Deaf Amish boy to Deaf school everyday and She told me that his parent wanted a TTY that he can carry with him. Even though they're Amish, they bent a rule to have home phone installed for son's sake. The lady told me she will find out in 2 weeks to see if Amish parent want it or not. I have not heard from her since. I still have her Biz card and planned to call her back.
So if this tty not sold here, I would try Amish community!!
Catty