While Lapis does not come from animal-based products, a farmable source of blue dye would fit well into this mod. Indigo is fairly overused in mods though, I suggest using woad instead, and the dye in woad is the same compound.

https://en.wikipedia.org/wiki/Isatis_tinctoria

Alternatively, sarcodon fungi could work as well.

http://riihivilla.blogspot.com/2007/11/dyeing-with-sarcodon-squamosus-vrjys.html

https://shroomworks.wordpress.com/category/mushroom-dyeing/sarcodon-fuscoinidicus/

https://en.wikipedia.org/wiki/Sarcodon_imbricatus

Appreciate all the info. Will look into it more later.