BMW R60/5 - Wanted

Hi Folks, I'm looking for my father's old black BMW R60/5. He brought it over from Holland in 1980. Last known owner was a James Thompson in Waterford, who sold it to a man from Limerick in or around 1989. That's where the trail goes dead. I don't know it's registration or chassis number. If anyone out there has any information about this bike, it would really make my day. Many thanks