I was involved in a similar search last year with the result that brought the supplies in from abroad. Customs was a bit of a hassle, but they didn't even know what it was and why they were difficult about.
There is one supplier on Salwa, Al Dana Medical, but they are promising for about 6 month to get a shipment of "decent" products :-(.

Dubai will most probably be the easiest solution.

Plankton