Hello Jaimie! Welcome to the Disney Parks Moms Panel.
It is unfortunate that you were unable to get an appropriate time slot for a Magical Makeover at Bibbidi Bobbidi Boutique during your upcoming trip.
I recommend that you check back from time to time by calling a Cast Member at (407)939-7895 as Reservations and plans for Guests change frequently and you may be fortunate enough to get a reservation before your Walt Disney World Resort vacation.
Also, remember to look into both
Bibbidi Bobbodi Boutique - Disney Springs and
Bibbidi Bobbidi Boutique - Magic Kingdom. If one is unavailable, the other may still have open spots.
As far as making a purchase for items is concerned, Bibbidi Bobbidi Boutique is a Salon and
Shop, meaning they sell a variety of items to Guests. Usually, these items are tokens to accentuate a makeover experience, but Guests are able to make purchases for items with a Makeover Reservation.
My wife purchased some nail polish that my daughter liked during a previous makeover on a subsequent visit in which we had no reservations.
Have a Magical Visit!
~Todd