After posting on Network 54 forums, some of the guys pointed out to me, that the seat cover was out of scale, and frankly did not look good.
I made the new seat- this time in leather.
i feel it serves the purpose well.
Pedals and handbrake were scratch built. I also added few knobs, and the turnwheel under the seat.
Now the cab is done, and awaiting fixing onto the body.