I am thrilled to let you know Mairiuna that indeed , I do have stamps commemorating The Lost World . They are from Liberia and were issued in 1999. It came in the format of a sheet of 6 stamps and a souvenir sheet.
Dinosaurs on stamps is a very popular collection amongst topical stamp collectors.
The first dinosaur postage stamp was issued by the People’s Republic of China in 1958 and per my last notes on the subject , they were 300 stamps produced by 57 countries through 1992.
I should get updated figures, or else I will make figure of a dinosaur myself ! Many were produced with typo errors or mistakes in the geologic eras but it spices up the research and the discussion.