I really like the Sector 111 micro-mirror. Installed on my Birkin (sold) and Storker. Normally, this mirror hangs from the topside of the Elise or Exige, so I had to fabricate a new base to make it fit on the scuttle.
http://i59.tinypic.com/24uzs47.jpg
http://i62.tinypic.com/20ua2it.jpg
http://www.sector111.com/parts/interior/accessories/micromirror.cfm