Sorry to tell you that you did not search well...

They are sold at Souk Waqif. Just go to the antique shops and you can find them...

Sometimes, they are sold in exhibitions made in Landmark, City Center and Villagio.

I think they are still being sold at Landmark at the moment, just in front of Carrefour...

*********************************
Obstacles are what you see when you set your eyes off the goal.