I see it in NEI.. 2.0.6 as well, but on FTB Launcher. If you put a defunct brain in a crafting grid, it should give the right one.I'm on 2.0.6 on Curse client. I don't see the recipe. Is that the latest version? If so, where would I find the recipe?
If not, you can try adding to the bottom of scripts/Modtweaker.zs the following:
recipes.addShapeless(<Thaumcraft:ItemZombieBrain>, [<Thaumcraft:ItemResource:5>]);