Just an update to this in case anyone else is looking for silver dash gauge rings in the future.
The nice folks at the other end of the ebay link above have an interesting understanding of the word "Express" so I won't be going with them.

Instead I'm getting them from this guy in Tallaght
http://www.sidabra24.com/
He is also on adverts here:
http://www.adverts.ie/interiors-parts/speedo-cluster-gauge-rings-bmw-audi-vw-mercedes-benz-honda-nissan-opel-vauxhall-seat-rover/6873006

I bought and paid for them today and they are already in the post.