WANTED: Window air conditioning unit to buy or rent

We thought we could get through the summer with just one unit for the bedroom... And we were wrong. Cooking in the kitchen has become excruciating in this heat. Please let me know if you have a window air conditioning unit we can buy or rent for the summer. We prefer to not have to buy a brand new unit, as money is tight right now. Thank you! -- Lisa Derry Nesson