Yeah, I was going to say what jonart said.
Another thing, why do you have to be so specific and spend so much on this certain makeup brand? Green is green, no matter what. What's wrong with buying something cheaper? If you're worried about skin irritation, you can always apply it to a small section of your hand to see if you're allergic.
Also, your typical Halloween "witch" is green, so people aren't going to recognize you as Elphaba, but just as a plain old witch. I don't see the big fuss. A witch is a witch. Green is green.
"We like to snark around here. Sometimes we actually talk about theater...but we try not to let that get in our way." - dramamama611