Gorgonzola

I've started having a look at possibly purchasing an R34 GT-T. I've noticed most have 3 gauges in a cluster on top of the centre of the dash. However, the car I looked at today did not have this cluster. Were these a factory option, or only for specific GT-T models? Also, does anyone have an English version of the GT-T owners/service manuals in electronic form? I tried searching but didn't have any luck. Thanks.