Your question is too wide open. You need to specify your model year. You also need to specify whether you want to go with OEM parts or are prepared to go with something like an aftermarket clutch such as one of the SOS clutches. Finally, if you have a later dual mass flywheel single plate clutch, are you going to replace just the friction disk, replace the friction disk and the flywheel or switch to a more conventional clutch and flywheel.
An SOS 275 clutch & flywheel is approximately $1700.
ScienceofSpeed Sport 275 Clutch & Flywheel (includes bearings) - NSX, 1991-05 - Clutch & Flywheel - Drivetrain Products - NSX, 1991-05
If you have a the later dual mass flywheel, an OEM friction disk and OEM pressure plate can be had for around $800 from discounters. Add in a new flywheel and you are north of $3000.
Labor costs for all options will be similar; but, vary from nothing if you do it to quite high if dealer mechanics do it. You can search Prime to find historic clutch labor costs; but, they may no longer be relevant.