The new inner halfshafts arrived from Blanchard today, so it looks as if everything is now here. The two inner halfshafts looked in bad shape when unwrapped, the longer being encrusted in ancient dirt and the shorter having a thick coat of what appeared to be soft black paint or a protective layer of some sort. The paint was so thick in the splines that I thought they had been worn down. However, degreaser and a few passes of the brass wire wheel later, they came out looking like new, and the good Hardy Spicer shafts that they are.
I have now sourced an inexpensive press, which will make bearing and spacer installation much easier over the course of the restoration, and so will wait a few days to see how the press appears in reality before perhaps obtaining one and using that to put the halfshafts together.