I have put set of interior car mats for a Bristol 603 on ebay, in case anyone is interested.
These mats came with my car and are surplus to my requirements. They appear to have been made by a previous owner specifically to fit the 603 floor plan (and would therefore presumably fit any 412/603 variant?).
more info on ebay :
http://www.ebay.co.uk/itm/Bristol-60...item1e6c1d0536
thanks
Andrew