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You're going to need a few blue bricks and plates as well as a 1x2, 2x2 or 2x3 white brick. The letters are probably a custom-made sticker. The loop at the top appears to be a cable tie - you'd need to look at the real thing to know how it's attached if you want a perfect copy.
Do you merely want to achieve the same finished product, or do you want the replica to be built in exactly the same way, using exactly the same parts? If the former, the difference won't be noticeable unless you take it apart or look really closely. If the latter, you'll need close-up images of the body and head in order to determine their makeup. I can see that either way you'll want eight 2x2 bricks and two 2x4 plates for the legs, and at least two 2x2 bricks for the tips of the hands. I could give you further advice, but it'd be pure speculation. I apologise that I can't be of more assistance. Perhaps someone with a keener eye could tell you more.
It's a little unwieldy and not great when it comes to shipping to Australia, unfortunately. Since you only need basic bricks, your best option would be purchasing them direct from Lego: https://shop.lego.com/en-AU/Pick-a-Brick
This is a lot easier to use. The basic search hardly works so you should use the advanced search at the bottom left of the page. Lego use specific names for specific colours, so blue = "Bright Blue", grey = "Medium Stone Grey", pink = "Light Purple".
I made your original blue running man in Stud.io for you.