I've bought some badges from this site before and I've been really impressed by the quality. I quite fancied getting the TF LE500 silver and black MG badge for my ZS.
They're available from his site (
http://www.something-magic.co.uk/) or via eBay.
I spoke to Marco, who runs the site, and he's told me he will soon be selling the silver and black TF LE500 MG badge in 59mm size suitable for the MkI ZS
If anyone has any further ideas, or suggestions of MG badges they would like, let me know and I'll speak to him, I've bought several different badges from him and the quality is excellent.