You need to plan this Migration, is the IP address same, you going to have same ISE version.
how big is the setup ? how many MNT/ PAN. PSN deployment ?
Look at the version and compatable :
Not sure if you will find what you are looking for, but have a peek here: Cisco Identity Services Engine - Cisco Identity Services Engine Ordering Guide - Cisco
Your best bet is to engage your Cisco reps as they should be able to help you with your request.