I've been looking for that, for a long time. In the meantime, I got an voip.ms Windsor, Ontario number and pointed it at my main VOIPo number. It needed $25 for PAYG service.

I have not paid much attention to its reliability ... when the mother-in-law is back from FL, it will get its real use.

VOIPo has plenty of services to introduce, and others to better integrate. I know they have the know-how to do it all, just not all at once

An old phrase I have used:
"We're too successful to be efficient!"