By using a simple matrix transformation on the shape file of the signal post and a repositioning of the head I was able to create a proper right hand side searchlight block signal.
However, on close inspection there is something off. It sort of seams the texture mapping is inside out, or however to describe it.
Take a close look at the right hand signal's base and notice there is no solid concrete block, nor is the mounting tube the same as on the left hand signal.
Do I need to "reverse" the texture sheet or will a remapping with different coordinates and "direction" do? There is hardly any info available.