Hey tcla75,
This is Jesse’s (jtsmith) controller, so I will pass on the post to him for some input.
You can reach him directly as well at 3 Prong Gaming on YouTube - https://www.youtube.com/user/ShortBusTrip - 3pronggaming@gmail.com
Sorry I can’t answer your question directly, I’m the animation guy. 
Thanks for getting the Zombie Pro pack BTW! We don’t have control with Marketplace sales, but on our store mocaponline.com we can give you an upgrade discount if you contact us first. We have more packs there as well that aren’t on the Marketplace yet. Just FYI for the future.
Cris