Footrest for jack knife sofa ideas?

We got 2 folding end tables at Costco that we can use outside by our chairs or inside as a foot rest. They collapse like folding lawn chairs (chairs in a bag) and have a little bag to store them. Light weight, take very little room to store. We got 2 for less than $30. We saw them at CW but I couldn't find them on their web site Here is link to one at Amazon. Copy and paste it.
http://www.amazon.com/Lightweight-Premium-Folding-Aluminum-Umbrella/dp/B00A8QYT1M/ref=sr_1_73?ie=UTF8&qid=1370889703&sr=8-73&keywords=folding+camping+tables