Maybe you could try to search for Epoxy Clay or Epoxy Putty such as Selleys.
I think that is the most common product.
Or you could just find a modelling or sculpting community in Dubai and ask them about this.
I had this similar problem when I started to do puzzle mods and what I do is googling all day long and ask to a lot of people to find similar materials.,,It is exhausting but at the end of the day you will satisfied your curiosity..
Same thing happen when I want to buy Mini grinder and other tools for puzzle making actually..
Your country maybe is the same as mine, Indonesia..
Hope that will help you..