The subject of whether Bullet Mirrors do or don't suit the P6 has been discussed at length, but if you're one of the people who think that they do, here's a nice cheap pair for sale.
http://www.ebay.co.uk/itm/2-Classic-Bul ... 258ae3eac3
http://www.ebay.co.uk/itm/2-Classic-Bul ... 258ae3eac3