Found the badges at last - small world - ex 260s member Andy Stevens (2003 Aurora ZT with white leather?) listed them separately on fleabay but I persuaded him that my need was greater than the trolls! Spent half an hour chatting about his MG provenance - nice chap.
Now I'm on the hunt for those 5-spoke alloys on the original promo pics
http://www.mgcars.org.uk/news/news645.html
Anyone know what they're called?
Thanks