tilt latch assembly

I am in need of your advice as to replacing tile latch assemblies for an Alside vinyl window. I have attached a photo of the left side assembly. It measures 3 and 1/2 inches long by 1 and 1/2 inches wide. The screw holes are 2 inches from center to center. To facilitate the process of determining the correct assembly, I have included a picture of the left assembly. I am in need of two left and two right assemblies. I would appreciate a response at your earliest convenienc