I have my NRG thin quick release, part number SRK-400CF, for sale. I only used it for 5 days on my car before I sold it. The buyer didn't want the quick release, so he let me keep it. I have had it for a couple months and finally getting around to posting it. Comes with all hardware and install instructions.
Also, if using grip royal wheel, this will work. The mounting holes just need to be rotated to get the wheel to stay centered, I never changed it because I sold the car.
$90 shipped. Please email me at [email protected] for details/purchasing, I rarely get on this site anymore.