It took me a little over 2 years to find everything. One would expect that Specialized parts would be easy to find but they were anything but! It seems that NOS XC Pro parts command almost as high prices than XTR M900.
I agree that it is much cheaper to buy the whole bike compared to building one from frame up. This is not my most expensive project at all since I got the frameset quite cheap (the seller didn't know what he had).
No, I know how difficult they, ( NOS Specialized parts), are to find. Perhaps it's because most specialized parts were put to purposeful use, (not babied), and therefore not readily avialable in good condition. But that's just a theory, of which I'm sure there are better ones.
and yes, NOS Pro XC, can be as pricey as M900, and I've seen them even go higher, since they are not as readily available.