Hello Dan,
Please download it at here :
CodeWarrior® Dev Tools for HCS12(X) MCUs|NXP

If you want download CW HC12 v5.1 , please select "Prerious" , then you can find it :

The two version all are the CW IDE you mentioned .

Hope it helps
Have a great day,
Alice Yang
-----------------------------------------------------------------------------------------------------------------------
Note: If this post answers your question, please click the Correct Answer button. Thank you!
-----------------------------------------------------------------------------------------------------------------------