No one makes this product so I retrofitted a bought product to do the job. It works and my wife on oxygen for 3 years asked me to make this for her. It is a do it yourself project, unless someone wants to make it!
Many oxygen patients that can get around the home by walking or wheelchair or walker and can use their hands could benefit from this.
I have seen forums for people in this condition on forums looking for the product, but none there.
You can go to this LINK to see it in action...