That's the one.
I'm in contact with Airfix, but I doubt they'll turn up anything. Images they'd have of products from back then would most likely be on slides. They might be able to turn up a catalog with an image in it, but it'll look pretty bad reproduced for the video. The image from Vintage-Airfix cuts off part of the box. I'm using that image as a placeholder for the time being. I'd like to use a clean image I can crop here. But, if I have to run with it, I'll contact them and see if I can get permission to use it.