Hello, I am having trouble finding replacement operators for casement windows. I have a single arm operator that is about 9 3/4 inches long from center of pin to center of operator housing. It is white in color and the markings on the back of the housing only show "Interlock, world patents, made in New Zealand, Design Pat Pending. I do not see any other manufacturing numbers. We currently have about 80 of these windows in our building and I'm looking to find about 20 each both and right sides. Thank you for your help!
Corbin
