Does a product like this exist?

Hi. I'm looking for something, sort of like a lap desk. Basically, the way I have my computer and monitor set up, I sit back in a chair and have a wireless keyboard on my lap + a wireless mouse resting on a thick book which itself is resting on a flat arm of my computer chair. This works great, however, I'm looking to buy a new computer chair and 95% of the new chairs have curved arms, which would make it very difficult to balance a book and mouse pad on it to use. So, is there something I could buy that maybe would attach to the arm and create a flat surface for a mouse pad? Maybe a small lap desk that could conform to the curved arms or something? I don't know. If you guys have any ideas of what I can use with a chair with curved arms, I'd love to hear it. Thanks!

 

Here you go: Virco 3400BR

HAHA JK,
they make these lap desks that are cushioned, but as far as attachable, I've never seen one. Example of a lapdesk: eComfort Lap Desk at Brookstone

 

Man, just use a gaming joystick My friend was using the one from xbox i guess 4 years ago. pretty cool!