I just got a new iRobot Create 2. I used to use an Element Direct BAM (Bluetooth Adapter Module) for iRobot Create previously.
How can I communicate with a Create 2 using Bluetooth? What accessories do I need?
The Create 2 projects page has a tutorial on how to make a Bluetooth serial module.
The Rootooth should work too. Although it is no longer sold, but you might be able to find one somewhere. Or make one yourself since SparkFun put all the designs online.
I couldn't find much information on the BAM, but I bet you could make it work with the Create2. Consult the above mentioned projects page to determine the new Create pinout and if any level shifting is required.