You can get any part from the Hara Edition separately if you wanted, but as already pointed out, this would be more expensive to do if you were to do it all separately.
Regarding the new shocks, my LHS has some in at the moment and I was tempted by them, but the shock top doesn't have the small bleed hole for the excess oil to leak out when you assemble the shocks. To me this is one of the best things about the Pro 4, the ease of building the shocks, I wonder why HPI have decided not to include them in the new shocks?