Custom heads :)

Well, some time ago I started developing my datapack and there is a structure that I want to change the "generic.gravity" attribute of Minecraft. After a while I came to the conclusion that it would be better to create a custom block that would give this effect regardless of any surrounding structure. So I went to misode and generated a crafting for this block that would be a player's head, but I want it to have this texture https://minecraft-heads.com/custom-heads/head/43698-dark-matter-core