Aha, what you need a the chrome ones which look silver when in the lights and flash orange. When you have the clear lenses and use orange bulbs, you get what they call the "fried egg look".
These are the type you need, I happen to have an unused brand new set you can have for £6.50 posted.
http://www.ebay.co.uk/itm/CHROME-Indicator-Bulbs-SILVATEC-BU582-T20-Capless-Wedge-/150512894718?pt=UK_CarsParts_Vehicles_CarParts_SM&hash=item230b4482fe