Greetings,

The Iridescent Acton of Aiming is as close designwise as you can get with the Chestpiece (obtainable via Marketboard, altrough it wont get you the exact colors as on the picture, but it is dyeable). There is also a alternative undyeable version of it in Castrum Abania which has a Darkblue Cape and a Black/White Chest area (drops from last Boss) in case youre interested.

The Arms you can recreate with the Aiming Gloves obtainable from Bozja Southern Front trough coin purchase. That's also as close as you can get.

For Pants, you should use the exarchic Pants buyable from the Marketboard since they give you the same Belts on the thighs as the image has.

Boots, there is a fair amount to choose from that look like these, also from the Marketboard, but the Urban Boots might be the best choice.

The Weapon, is tough. The lost Allagan or Scaevan Bow from Rhalgyrs Reach should be the best choice, but there is also 3 "foldable" Bows also on the Marketboard if youre interested, but they dont have the futuristic design and are quite large.

The Headpiece, will be difficult. There arent any headpieces like that for Aiming Sets as far as i can tell, so a Circlet or a headband will have to work out for this.