Where or how to get 70736 single pieces?

Recently I decided to rebuild some of my old Lego sets with my little sister and then give it to her since I don’t use them anymore. And while rebuilding the Lego ninjago ghost dragon for the set 70736, we realised that we are missing the last part of the tail. And I’m wondering, how and where to get them in good condition since the set is quite old now. I tried block link it’s not there.