If you've got a Series 1, then have a look at the link below. A great value Walker's Rear Exhaust box for 20 quid inc' post. I put this up on the CCC site as well when I ordered one. I fitted mine without any hassle. There's only one left. Hope it's of some use to someone.
http://cgi.ebay.co.uk/ws/eBayISAPI.dll?Vie...e=STRK:MEWAX:IT