I got a picture of the Berk crest off the internet and used an app to scan it and create a 3D model out of it, then I took a disk in tinkerCAD and removed the berk crest model from it so it is now a disk with a berk crest shaped hole, then I just added the Berk crest as its own model so the could be printed in 2 different colours, they should go nicely together but you might need to glue the pieces together.