We searched on the shelter's website and found a cat very similar to ours in description. Hopes went up but sadly it wasn't her. However the shelter is notified at least that a cat is lost, and we're going to keep checking the website regularly for updates. Our neighbours two and three doors down were asked about it but they haven't seen anything and well, posters are being printed now as I type this. I will post a poster in each the building's lobby, thanks for that suggestion!