You can search on a map on AirBnB. That’s how I did it when I was onsite. Just zoom in on where property is and it will show you any listings. If they didn’t have it listed in their name (most of the time they did), usually the patio/balcony photos would help determine the unit because I could figure out where they were on the property. You may have to play around with the search filters and also select “I’m flexible” when selecting your date