Casement operator and handle for unknown brand

Hello, I am looking for a replacement part for a window. I am attaching the picture to the casement operator which has 3 serial numbers (30830,30842R, 30844R Patent 1982) I would also need the handle for it. I am interested in purchasing the one for the other side as well. I hope the pictures are helpful in finding the right part. Hope to hear from you soon. Thanks Wanda Nieves