Marvin Gaye Tribute held at Motown Historical Museum 1990

I was reading a story from the April 1990 Jet magazine which had a story telling about how on April 2, 1990 [[which would have been Marvin's 51st birthday) there was a celebration of his life and legacy held at the Motown Historical Museum's FIRST Marvin Gaye Tribute.

Two questions. Was this the one and only celebration ever held there in his honor, were there any additional ones? Does anyone have in their possession any promotional handouts that may have been given out on 4/2/1990 at the celebration that they could make available for members?

Thanks.

I know there was some tribute a while back at the Motown Museum. I don't know if it was this year or what though.