http://www.propshaft-services.co.uk/
The rubber of the centre bearing for my Estate was shot. Since the props are damned near impossible to find I've taken it to these guys and they have refurbed the prop for me.
The centre bearing is the same as the one on a Morris Marina except the attachment flanges are longer. They have use my old one as a pattern and welded the attachment flanges of the old bearing unit to the replacement Marina one then they've gone over the rest of the prop, re-assembled it and painted it.
£96+VAT which I thought was fairly reasonable.
The prop for my Magnum was in a pretty poor state so dropped that one off with them when I collected the Estate one.
If you want a two part prop sorted out these guys can help. They can also arrange collection and delivery.
They did price up for a production run of the bearings, they would be £50 but a minimum order of 500 so I think this refurb route is the best option it you need this problem sorted out.