Here are links to options for each of the missing pieces. You definitely don't need to get these specific items and can just use them for inspiration, but the links are also here if you'd like to simplify things and just pick from what I've linked to.

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Outfit #1 (Blue 2-Piece)

White Boots

Option 1

Outfit #2 (Orange Dress)

All set with this one!

Outfit #3 (Plaid Dress)

White Shoes

Option 1 (White Patent or Ivory Patent)
Option 2
Option 3

Outfit #4 (“Suit” Look)

Option 1
Option 2
Option 3 (White)

Socks

Option 1
Option 2

Shoes

You could either go with the same white shoes we’ll be using in Outfit 3 OR you could do a white oxford like these ones. Whatever you like the look of best!

NEW
Backup Options

Option 1 (White)
Option 2