I asked a similar question a few weeks ago of hiring vs. a friend, or compensating a friend, etc. I am not having any luck finding an organization or business that does companion care in nursing homes... has anybody used an organization or have any recommendations? I am moving soon and mom's memory is getting worse. She used to be a strong advocate for herself now she just gets frustrated and forgets. Even having trouble with her phone. The staff is not much help when I call.
You can call an in-home care giving agency like Home Instead or Visiting Angels to hire a companion to sit with your mom but it will be very expensive. They will charge the same hourly fee for actual care giving as they will for companionship, so it's likely not financially possible. Google "companionship for seniors" and you'll get lots of hits to find agencies and resources. Narrow it down to your specific area, of course.
There was actually a thread in 2011 about this very topic, you may want to check out the responses:
https://www.agingcare.com/questions/hire-companions-for-elder-in-assisted-living-148828.htm
Good luck!