Replacement casement window operator for ROW windows

Good afternoon.
The windows are approximately 25 years old. I have not removed the operating mechanism for fear that I will do damage or otherwise end up having to replace the entire window. I've got a handyman who can do the extraction and replacement part of the program, but finding the part(s) is my job. I am looking to replace both a "left opening" and a "right opening" operator(s). Are the attached photos sufficient? Any help you can offer would be greatly appreciated.