Finally, I've got the Mono Potassium Phosphate - MPK - 0-52-34.
I had to drive to Saudi Arabia to get the KH2PO4, Since I've tried to order from GreenLeafAquarium, AquariumFertilzer, AquaFlora Nurseries, but PayPal didn't accept my credit card because it's from Kuwait.
The trip was 1600 kilometers = 994 Miles (Total), And i bought a 25 Kilogram which is 55 lb, The price is 145 Saudi riyals = 38 U.S. dollars.
15 Hours of driving from Kuwait to Saudi Arabia (Al Riyadh) and the way back.
Now, its time to use EI Method to feed my poor stunted plants