Maybe ask the people at Angels Collective. I don’t know if they use vegan inks or not but if I had to guess, they’ve probably dealt with this before. https://www.angelscollectiveri.com/
I would recommend reaching out to the artists whose work you like and see if they already use vegan ink or can order it for you. There are brands of ink that advertise being vegan, so it's not as much as a specialty as it used to be. Good luck:)
MarlKarx-1818 t1_j9dc1ah wrote
TIL tattoo ink contains glycerin. Sorry, I don't have any advice but thanks for teaching me something!