Figuring out answers to your questions would make sense, I think, if you wanted to sell multiple wheelsets using this stuff.
If you're simply looking for one wheel, i'd consider buying something else.
Giant SLR1 42 is:
Rim Outer Width: 23mm
Hookless
That's 2 excellent reasons to buy something better.
I'd go wider, and hooked.
Virtually anything you'll find will be better than this.
There's a good chance that the inventory is genuine, and it's just that nobody is buying such old kit.