Gandalf, I think I have a friend with this very pc and restore disk. I will email her and see if I can borrow the restore disk which I can copy and send to you.
She does not check email daily, so it may be a few days but I will let you know.
I was at her PC last time home, the modem was a real pain (PCtel) and I ended up replacing it - I do not know if it did not like 98SE which I also put on for her, then used the MS security update disk to put on all the 98 updates. It was working on normal 98 before I reformatted her drive.