M B Doc, thanks for reply.
A bit more investigation after clean-up of the complete driveshafts reveals that the centering sleeve consists of a small bronze bush, mounted in "rubber" within an outer sleeve.

I first thought that the bronze bush was exchangeable, but it's the whole sleeve that is to be replaced.

My first thought was to simply press out the sleeve using a long steel bar right through the middle of the hollow propshaft. This was soon rejected, because the diameter of the sleeve is larger than the splined aperture at the other end of the shaft.

I've now managed to extract this fairly easily by crossdrilling the sleeve at the outer end, then inserting an 8mm bolt which provides purchase for a carefully angled blunt chisel. A few taps on alternate sides quickly shifted the sleeve.

BTW, I'm handling this prop like an egg, strong but fragile. Means using cloth to protect vise jaws, light clamping, good support without undue force and so on.

I can't take credit/blame for the above method of removal, since I read it somewhere in this forum a few days ago (in the vintage section, I think) but I can't find it again, to link to this post.

I'm a little surprised that there hasn't been a thread devoted to propshaft reconditioning, my research on this site has so far provided all the info that I've needed; it's just spread around a bit!

Apologies for the over long post, hopefully it will save time for someone else.
Simon

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W202-C220D ( UK ) 310K miles