colorbond metal fence post - Spence

I am making a gate in ColorBond metal fence and I am short one (or two if that is not too greedy) of the posts as shown in the picture below.
They need to be 1.5 metres long, but as they will be used to surround the edges of the gate, I can join shorter pieces if necessary.
Matching green as shown in the picture would be ideal, but I will settle for what I can get.
In case you can't read the dimensions in the picture, the narrower part is 60 mm wide and the wider part 70 mm
Ideally Belconnen or North Canberra, but I will consider whatever is offered.

Thanks

Jim
Spence