Using LT3798 sample circuit for 5 V 3 A output

I am interested in using the given example circuit (linked below) for my senior design project and was wondering what transformer (part # off the shelf) I could use to provide 5 V 3 A output? (Preferably from Wurth Electronic) Additionally, I am interesting in using this for a 5 V 3 A output, what changes might I need to make to the circuit in order to get 3 A output instead of 2.2? Thank you very much for your time.