One of my favorite postcards is the one that was reproduced, from historical photos, of Olympic and Titanic at Harland & Wolff, Titanic off to the side of the Thompson Graving Dock, with Olympic being pulled by one of the tugs.
That picture was recreated in a Harley Crossley painting, which I bought in 1996. I don't know how many copies of that painting are still available.
John Clifford