At about 7 minutes into this video the girl uses what I think is an upright chicken roasting rack. She lubes it and inserts it into her pussy and gives the camera a great view inside her.
http://xhamster.com/movies/2023516/edita_and_039_s_vaginal_inspection.html
After doing some searching I think this is the product she was using. I only find it sold in the UK, but I'll keep looking.
http://www.amazon.co.uk/STAINLES-STEEL-CHICKEN-ROASTER-UPRIGHT/dp/B004V41R30
http://www.amazon.co.uk/Chicken-Racks-Oven-BBQ-Smoker/dp/B009RGD9SS
After looking at all the chicken roasters on the market I think there are some very important features about this particular model. It has three loops of wire which make this a six sided item once inserted. Some others have only two loops, making only four sides. I suspect the six sided shape gives a better view all around. Also you certainly don't want any horizontal rings or sharp edges going inside. The tip looks cleanly made, smooth and maybe not even welded together. It should perform similar to a kitchen whisk, but maybe a little stiffer, and with a better view after fully inserted since there is no handle in the way.
After seeing how well it works for an internal inspection, I'm surprised that a speculum has never been invented that works like this. A tool based on this approach would still want to insert in a narrow or slim form factor, and then once inserted it could be opened up to approximate the shape of the chicken roaster. I may need to start doing some research on a new invention.
Has anyone spent any time mounted on a roaster that they would like to tell us about?