Does anyone know of a place where the person who needs memory care can live with their partner?

Hi Janice, Is the memory care person a wanderer? If not, many assisted living facilities have rooms or suites that can accommodate two. These facilities can be pricey and do not qualify for medicaid, especially if one person doesn't need assistance with ADLs - Activities of daily living.
Also, a continuing care facility may work on the independent living side, again if the one is not a wanderer. The ones I am familiar with also have aides available that could work with the one who has dementia allowing the well partner to do other things.