FDISK v4 for PS/1 ( Beth Dorman )
My guess is that any FDISK on any DOS ( v3 or higher )
will do for this. My current Windows computer has fdisk,
for example. Many, many others on the list know more,
but I think you can Format ( with 'Copy System Files' ) a
floppy, and put fdisk on it with a New computer and be OK.
John A.