Here is a tablet stand with wheels that lets you use your iPad anywhere in your home or office. The StarTech.com Mobile Tablet Stand can handle tablets from 7 to 11 inches. It comes with a detachable tablet holder. You can rotate your device 360-degrees and tilt it 280 degrees.
This tablet stand has a 19.7 x 19.7″ stable base with 4 lockable casters. Its clamps can be adjusted from 6.6 to 7.8″ in width.[where to get it]