Are you talking about the camera system for LA quilters so you can see what is happening on the back? If so the product is called "A quilters eye". Way too pricey for me! But I am still physically capable to get on my hands and knees with a flashlight and crawl under.
Here is a link to the manufacturer, they have a page listing dealers. I would think you could hire a teen computer whiz to put one together for you for less.
http://www.aquilterseye.com/