You can find many utensils, kitchenware shops in Rue Monmartre.
You can walk from Etienne Marcel(Line4), Sentier(Line3) and Les Halles
・Mora
13 rue Monmartre Paris 75001
・a. simon
48&52,rue Montmpartre Paris 75002
・Deco relief
6 rue Montmartre PARIS 75001
・La Bovida
36 Rue Montmartre, 75001 Paris
・E. Dehillerin
8-20 Rue Coquillière, 75001 Paris
・G. Detou
・Librairie Gourmande
92/96 rue Monmartre 75002
Book shop for all cuisine, patiserie related books. It is amazing place.