For your shape Prado, there is a modified bumper available for offroad - part metal + plastic + rubber that should suffice the RTA clause of no full metal bumper. Go to tires and accessories shop near Sahara center before Troy university crossroad and many shops have ARB, TJM and ARB look-like bumpers for Prado. My price guess will be in range 1500 - 2000 dhs max depending on your bargaining skills.
Choose less aggressive to retain the same looks as you are not intending this car to modify for 100% offroad and it will be your daily driver too. Basically look for a bumper that can keep similar front looks and trim the sides upwards as that's what the impact area in this shape of Prado.
Also, my suggestion is to avoid bullbar as we don't hit Kangaroo's here in UAE, as it will shave a bit of weight on the nose, which is better for a long hill climbs. And for adding additional light, I highly suggest LED bar on top than the front nose, to have a better spread and saving it from nosedive impact.
Get the front bumper sorted first and drive for few drives and then judge if you need firm suspensions or stock is reasonably good for your usage.