I drive a Ryperd (Africaans for horse) cunningly disguised as a TD5 Discovery. I call her Ryperd all the time but it does feel cold sometimes with the saddle on the roof!!
If I remember correctly, we used a lot of parts from the Rover parts bin during the development of disco 1. The door exterior handles were off the Marina (remember that bag of rubbish), the tail lights were off the Maestro van and the headlights off a sherpa van plus a load of other parts scavenged to keep the costs down. It was only when we started with Disco II and we had some more money that more dedicated L/R parts were designed.