Rusted arm of a truth casement crank window

the arm that is marked in the first pic is rusted and broke free, while in the second pic a normal one is shown. Question one what is the part number (truth casement crank windows )of the arm that is just linking the window with the frame and is NOT PART of the cranking mechanism, It had rusted and broke at one end. the second pic shows one not rusted . I also want to know if that part can be snapped out of the place, and the new one simply beeing snapped back into place, Thanks in advance. As we live in Montreal Quebec if possible point us to a local place we can buy or a part number that we can buy off Amazon or else on line. Thanks. Lian