If u get a second hand one from a scrap yard you will get what you need, so if it's pressed bearing they give you the whole thingie with the thin metal plate that protects the rear brake disc.
It also could be you will just get the 4 bolts where you place your rim on, then you are in luck, just remove the brake, remove the cap, loosen that 32mm bolt and it should fall off.
In the first case you will need to realign the car.
I have no Almera GTI so that's why I tell you how I would solve this, first get the part second hand and from there you will know what to do.