I'm after the above for Whitey - It's the inner shaft that's within the upper section of the steering column assembly (what the steering wheel locates onto, and the other end slots into the U.J).
Replacing the column bushes on Whitey and noticed the shaft teeth (that slot into the U.J) have seen better days (read worryingly worn), hence would rather play safe for the future with another shaft with more meatier teeth present.