Hello Curt,
now CodeWarrior 10.7 is the latest version which supports MPC5605B. So far I do not have any information about next version.
But there is S32 Design Studio for Power Architecture, which also supports MPC560xB microcontroller family. Please see this link:
S32 Design Studio IDE|NXP
If you have any other questions, please feel free to write me back.
Regards,
Martin