Have you found the images that you are looking for yet? I did a quick search here at Dreamstime and found several that are close to what you describe, but you may need even more people) If you like the combination of people in one of the pics, but you don't like the pose, be sure to click on the option to view more images with these models.
Please let us know if these are close or not. If they aren't what you need, let us know what would get them closer. This helps people know how to help you with a search or what to shoot if someone decides to create something new for you.
Also, what is your deadline?