Hi, as stopgap i bought these :
http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=280479081897 they fit and are better than no mirrors but are obviously not a high quality mirror at that price. They dont look that bad probably the right sort of shape for the era. I considered certain age of cbr900 mirrors with 40mm pcd but thought the mounting angles might be all wrong and wasn't going to risk a lot of money doing that. If u come across anything better let me know.