Anybody who's interested, they're on my Google Drive:-Just go to that folder, and d/l whichever one you need. These are original MS Network Administrator standalone installs, which I've had archived for quite a few years.
Agree with the 'hard to get hold of' part! I'll add to this:-I'm also going to make available all three of the 32-bit XP service packs SP1, SP2 & SP3.