Which version specifically, as there are different font foundries who have
released something called 'Calibre'...
https://klim.co.nz/retail-fonts/calibre/
https://www.typewolf.com/calibre
https://freefontsfamily.com/calibre-font-family-free-download/
https://fontdafont.com/calibre-font-free-download/
https://www.cdnfonts.com/calibre-2.font