Larry,
They have those back braces in the UK, I know several men who have had to use them as they had a tendency to hunch over. This does no good to help keep the head of the man back as this is another problem. I have not heard of it being used for the ladies. The ones described to me were made of wood and leather. I am certain any of the large studios in the UK could give you a location where such a device could be purchased.