Ha! Amazing. And you couldn't have bought them from a better seller, too.
As for the hubs: Nope, definitely Hugi front and rear. On ceramic 121's though, that part's correct.
He ran an XTR drivetrain but not hubs.
As for tips, my main one would be to read this:
https://www.retrobike.co.uk/threads/1995-specialized-s-works-jmc-replica.371254/
Everything you could ever need to know is in there. Along with the fact you'll never outdo it!
The problem with a JMC build, is all the bits you need everyone else wants. And if they have them, they're going to cost a pretty penny.
The other thing is, the saddle and the tires are some of the hardest things you could ever try to find. So it'll all depend on just how specific and spot-on you're trying to be, or how much patience and coin you have.
I went a year earlier with frame, and then mixed up my component choice with other stuff I liked from the era, that was inspired by his bike as well as other things Spesh offered as upgrades around that time. I found adjusting my goals meant I had more chance finding stuff that worked, but also ended up with a bike that still felt like mine, without being a part-for-part replica build. It was more an homage to his bike and its vibe.
But hey, if you want to go full-on replica, it's a noble endeavor and there are plenty of others on here who have done it.
@Spudly and
@Joe*Pro have both done exceptional jobs. And I think a couple of other members have similar build aspirations on the go at the moment.
Someone literally bought the exact frame and fork combo you'd need off
@Flow just last week, I believe.
So yeah, you're in good and exalted company!