advnarayan, you can find a lot of that sort of information on www.imdb.com,
the Internet Movie Database. I've done a little searching and found:
Of the Haddocks, Georges Wilson is still alive and acting, with a couple of projects to his credit for 2005; Jean Bouise died in 1989, and the film Nikita
, on which he worked is dedicated to him.
The Calculuses: Georges Lorio(t) may be alive, but he hasn't made an appearance since 1967; Félix Fernández died in 1966.
Like Lorio, Jenny Orléans (Castafiore) may be alive, but her last credit was 1974.
Franky François and André Marié, the detectives for Oranges
have virtually nothing against them, and again are missing in action. M. François seems to have been a clown, who was partnered by James Hodges (and sometimes in a trio with Liliane Hodges), and it was the pair of them who were intially offered the double act of the detectives. However Hodges demurred because he would have been required to shave his hair and beard for the role, so François took the rôle with André Marié (who it would appear dubbed both their voices).
I'd be happy for any and all survivors to have the fun of a cameo in the new movies - it would be a nice tip of the hat to their contributiuon to the overall Tintin movie mythos.