We have just released a new feature on ExpertFlyer that allows you to select a UK POS for a Flight Availability search which may give you better results. No, we are not aware of how to get a DXB specific availability point of sale or if it would show different results as compare to the UK/USA points of sale.

To answer your next question, we are not sure if we will apply this to the Award & Upgrade search, or if it is even necessary to do so. If someone finds a case where the Award/Upgrade inventory is different based on POS, please email us and we will look into it.