Sorry there is not a direct replacement for the HC11 family, this is too old
You can check the S08 family (current 8-bit family)
Almost all the S08 devices has better features than the old HC11 devices
you can check all the S08 devices on the next link
https://www.nxp.com/products/processors-and-microcontrollers/additional-mpu-mcus-architectures/8-bit...
Depending on the application you can check the best option for you
But you will need to developt a new code and a new hardware
Regards