Change Phoenix BIOS System Model

I need to change my Panasonic Toughbook CF-18 system model from CF-18NJHZBBM to CF-18JHU80TW if anyone has the time. I can pay if needed. Had to install a new motherboard/hard drive in my work computer and it no longer recognizes as a Toughbook so I can't install my work software. I really do appreciate it! Here's my BIOS backup. This is my first time so any other info please let me know.

  PhoenixTechnologiesK.K.-V5.00L10.rom (Size: 1 MB / Downloads: 0)