The more compliant ride of the NC1.8 and 5-speed box is one of the reasons I usually prefer the smaller engine in the NC range for normal road use. Saying that I did have an NC ZSport and it was a great car, colour, interior, wheels, Torsen rear diff and traction control, brilliant package.
I am currently using the Autodoc application on my phone to order some car parts for my NA and used them to order a complete suspension setup on my last car which was an NB after a forum member @McTrucky recommended them.
Might be worth a try and as mentioned Mx5Parts…