Help-which mirrors for a landrover Discovery 3?

Hi. My name is Gemma. My husband and I have just purchased our first caravan as we have 3 small children. We have kindly inherited some mirrors for the car but they do not fit brilliantly.  Would anyone be able to advise which mirrors they have found work and fit best for a Landrover Discovery 3 please?  Your help would be much appreciated.  We have just had our first trip away and loved it.  Thanking you in advance. Gemma