Your Vampire: The Masquerade 5e core book early shipment code can be found in the same place as your PDF code via your original order email.
To use this code, visit http://www.modiphius.net and add the Vampire core book to your shopping basket. Check out and copy and paste the code into the 'promo code' area before completing the purchase (which will give you the book for free, but you will need to pay shipping). The core book will be sent out straight away, stock permitting.
Then when your bundle arrives, it will have the core book removed so you can slot your pre-purchased book in to complete the bundle.
Please note: we are aware of an issue where only one code is visible for people who have ordered multiple bundles containing core books - we are working with SendOwl to rectify this asap.