Yes it is the catalogue of that exhibition available in the bookshop of 'L'institut du monde Arabe'
I clicked on the exhibition "Des trésors à porter" scrolled down the page and there you click on 'Librairie et boutique' and 'voir le produit' and you end up on the page below:

http://www.imarabe.org/en/boutique/produit/des-tresors-a-porter-bijoux-et-parures-du-maghreb-exposition-ima-du-11022016-au

It costs 25€ and it looks like it is still available.

A word of warning: the collection itself has some old and exquisite pieces of a very high workmanship quality I had never seen before BUT the pictures in the catalogue are rather amateuristic and according to me taken some time ago. My friend took pictures through the glass of the showcases and the details were much more visible than you see in the catalogue!
If you can, you'd better see it in real, the catalogue on its own might be disappointing compared to the real thing.