I used to sell MK, and you may be able to contact your representative and buy quite a few of the ones you like for CHEAP. They change things up like that so even if the rep has many old ones, they are sort of forced to buy more for the company. I know any time things are going out, there are people stuck with 40 lipsticks in old cases, that they have to move at lower prices, because customers want the new ones in the shiny pretty case.
If she doesn't have it, she may know someone who does, like her upline. Also check on ebay. Even though they aren't supposed to, reps do sell their old stuff there. Just make sure the seller has a great reputation, good feedback, and says it's new in box.
Hope that helps!
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“All his life he tried to be a good person. Many times, however, he failed.
For after all, he was only human. He wasn't a dog.”
― Charles M. Schultz
Warning: The above post may be dripping in sarcasm and full of smartassedness.