The wing sidelights are a type 233 4 watt, with a BA9s fitting, so googling either of these should get you what you are looking for.
The Number plates lights are the same bulb but there are 2 of them in each light.
(This is for the 02 trads, not sure what has changed - if anything - since).
Last edited by Brian V; 12/02/13 10:16 AM.