They sell the flavoring and you would have to mix it up yourself or you could bring the flavoring into a vape shop and they should be able to make it for you. I have a few of them in my store but do not put it on the signs, there is nothing illegal about it, but I don't want to give them a reason to seize my supplies for evidence, while they find out I did nothing wrong.
hmmm this might be a more cost effective solution than the zombie juice.