After seeing the following post on Swedespeed.com I decided to follow the instructions to turn our shabby second key into a new looking one...
http://forums.swedespeed.com/showthr...-key&p=2053944
I bought an as new key off eBay for about £24 and embarked on transplanting the RFID chip and the circuit board from my key to the new one. Splitting the new key open took some time although my own one came apart very easily. I used standard superglue to put it back together again. The result is attached with the original key pictured on the left and the finished article on the right. About 30 minutes work all in. I used electrical tape to "clamp" it back together for a coupe of hours after gluing the two sides together again.
Hope it helps anyone that doesn't like a shabby key.
Iain