Where can one find a portable fan (about 10" or so) that blows either warm or cool air?

My friends bought several a few years ago, but now aren’t sure where they got them. The fan could be set to cool 65, cool 75, regular, warm 75, or warm 85 (or something fairly close.)

I am trying to find one of these for my friend who works in a building on the third floor. The AC cannot be fixed until the parts arrive, and it may be a bit yet. It is extremely hot up in her office, so I told her about this type of fan my friends have, but now can’t locate the fan to buy. Help!