http://www.240zrubberparts.com/apps/webstore/products/show/4818298
http://www.240zrubberparts.com/apps/webstore/products/show/5161875
"series 1"* or as I prefer to call them "early s30z" parts are expensive as I'm sure you'll discover. The good news is as they are becoming more collectible more vendors are reproducing parts that were NLA for them.
*series 1 is very much North American nomenclature, very much like the way they refer to amber turn signals as "Euro spec" when in fact it was also, South Africa, Australian, New Zealand, Japanese and probably more locations outside of Europe.
I've got an early choke knob, but it has a missing chunk out of the bottom of it.
Lucky you to have a good condition console. Pretty hard to find them without the stress cracks in them now. I may end up getting mine 'recovered' by Dashboard Restorations in Victoria to give it the 'correct' grain look but at this point it's not a huge priority.