Hi, retro computers fellas!
I flashed the BIOS of IBM Aptiva 2139 motherboard (V66XA) with Acer's BIOS because of newer CPU support and now I reverted back to it's original IBM's BIOS, and of course serial number in BIOS now is 00000000. Before I flashed the Acer's BIOS I wrote down the original model number, serial number, BIOS revision, etc. from the original IBM BIOS on paper, but now I need some additional DOS tools (CHGDMI.EXE and MODEL.DMI) to burn these numbers into the restored original BIOS. The user manual "says" the following:

I don't have any service CDs or diskettes for the IBM Aptiva 2139 machine and I couldn't find these two files on the internet.

Any help with finding CHGDMI.EXE and MODEL.DMI or some original service CD for IBM Aptiva 2139 will be appreciated.