Sorry, wasn't sure which thread to post on and if I've missed an obvious one for selling than I'm more than happy for you to redirect me.
I'm looking for all the components required to carry out OP's DIY - you can appreciate that there is no information available in the UK because to my knowledge no one here as carried out this install before.
The only parts I have been able to potentially source are HVAC AMP and Dials respectively;
2009+ NISSAN 370Z AC AMPLIFIER CONTROL MODULE UNIT 27760 1EA0A | eBay
and
2010 NISSAN 370z 3.7 V6 CLIMATE A/C HEATING CONTROLS MODULE | eBay
Thanks