The headset and bearings were intact when I bought the stripped frame, as was the bottom bracket. Fortunately, though scratched and quite well-used, the frame was structurally perfect and not bent or misaligned. The Russian team did not retire these bikes following their 1980 win, but used them as trainers. Mine came to me with original enamel paint and decals.
All other parts I procured NOS: rims, groupset (in bits and pieces, $$$$), saddle, cables, etc., and I am doing all of the machine work and set up. looks like I may have to make some custom decals, as well; available sets are just a bit off. No biggie.
Here's how it looked this morning, sans bars and bottom bracket yet but newly-painted and partially assembled:
More as I progress...