https://www.naturix24.de/pflanzliche-einzelprodukte/harze

some sample greek sites, not necessarily the best
https://orthodoxresources.org/athos/athos_incense.aspx
https://www.ieraskevi.com/en/70-incenses-livania-mount-athos
https://www.monastiriaka.gr/en/mount-athos-frankincense—charcoals-c-2_71.html?cPath=2_71&cpath=2_71&cpath=2_71&cpath=4_33_205_0_2_71
https://www.kelliotika.gr/en/handicrafts-en/mount-athos-incense.html

in the upcoming video…
https://drive.google.com/file/d/1-fhOL5GjZQ4OehSJywpsimgwfzjzkGOZ/view