I've also made mine from bricklink around February.
At the time I opted for Dark Blue 1x2 bricks instead of the 1x4.
I was still able to find the hoses in white (I recall they where the last from one seller and when I decided to add another level a month later they were no longer available, and used light gray)
The arches in Dark Blue weren't available when I started, but a couple of weeks later was able to get a set of them for a very decent price.
So I had a couple of colours to try and ended using only one arch in dark blue, because I prefered the arch over the gate in tan.