With all this talk of gauges, would anyone happen to know where I can source these main replacement gauges and associated led's?
Thought you meant all the pods hey. Umm the gauges faces are everywhere ! So many different companies print them out to suit. Not sure about the led rings tho.
You will probably find that the LED rings are actually still gauge face. They are EL panels. Search Idials or indiglo/indiglow/indigo gauges.
http://www.importcarpartsplus.com/300zxturbo92-96.htm http://www.whitegauges.net/categories/Nissan/300ZX/1992%2d1996/