I wonder what the PAF's air-to-air refuelers will be; I think there is a strong chance of either KC-135 or the A-310 MRTT. IMO the PAF may choose A-310 MRTT; it uses both hose-and-drogue and/or boom systems, suitable for all PAF aircraft. Cost wise, the airframe could be procured fairly cheaply - and the conversion would not cost more than 100mn USD per aircraft.