Unimog Club UK

Thanks.  I've been doing more digging, Google is a wonderful thing, and it seems several people have used an electric power steering column.  Seems a Vauxhall Corsa is a popular choice.  Chop the Mog column, weld in the new one, attach 12 volts via a module to control the amount of assistance - needed because the 404 does not have a speed sensor, and away you go.  I'm sure it is more complicated than that but it gives the jist.  All up about £200.