All the HC08 is not recommended for new design you will need to move it to the HCS08 (S08) that has better features than the HC08, please check the S08P family on the next link
https://www.nxp.com/products/processors-and-microcontrollers/additional-mpu-mcus-architectures/8-bit...
also check the following document
https://www.nxp.com/docs/en/product-selector-guide/HSC08-LINECARD.pdf
I believe the S08PA32 device is the right option for you.
But you will need to develop a new hardware and a new software
Please let me know if you need more information
