As Alismum has said, pencil grips are available in Dubai Library Distributors. I got similar ones -not exactly the same- from there though that was a while back.
<em>edited by dubeye on 18/04/2015</em>
Creative Minds on Um Sequim Road have similar but to get these exact ones you're better off ordering them from Amazon. I find the 'claw grip' very effective.
http://www.amazon.com/The-Pencil-Grip-Writing-C-L-A-W/dp/B002AGN4N2
I am looking for pencil grips similar to the ones in the link below. Anyone seen them anywhere?
http://www.amazon.com/The-Pencil-Grip-Crossover-Ergonomic/dp/B001SN8HPI/ref=cm_cr_pr_pb_i