What bulbs do you mean? indicator bulbs or bulbs for the whole unit?
What colour is the car?
I have a Monaco Blue so put Osram Diadems in instead of Silvervisions (Diadems are light Blue but do the same job as the Silvervisions )
front and rear indicator bulbs are the same. i put cheap ones off ebay in mine, looks great and works fine
silver bulbs btw