I'm glad you found my post helpful.
I think an IPDM/ER from the scrap yard or ebay would be a cost effective choice.
Here is the link to the Nissan part 284B7-1BN6B:
https://parts.nissanusa.com/p/Nissan...4B7-1BN6B.html
Click on "What this fits" and it shows "Nissan 370Z 2011, 2012, 2013"
To avoid paying the "Z tax" the same part number is also used on:
INFINITI EX35 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017
INFINITI EX37 2013, 2014, 2015, 2016, 2017
INFINITI G25 2011, 2012, 2013
INFINITI G37 2011, 2012, 2013, 2014, 2015
INFINITI G37X 2011, 2012, 2013
INFINITI Q40 2014, 2015
INFINITI Q60 2014, 2015
(from:
https://parts.infinitiusa.com/p/8958...4B7-1BN6B.html)
Now you have some options and I suspect the G37 IPDM/ER will be a lower cost, more available and it's the same part.