Saw this i was thinking about it but mine is chrome anyway and dont think its worth changing it and paying to have AMG written on it...
http://cgi.ebay.co.uk/Mercedes-SL-R129-AMG-Chrome-Exhaust-Trim-NEW_W0QQitemZ330201654556QQihZ014QQcategoryZ10398QQssPageNameZWDVWQQrdZ1QQcmdZViewItem
Raj