Eric, the best NSX smog guy I have found is California Test Only Center at 6305 Watt Ave #104, North Highlands. You may not have the same problems since your car is pre-OBD-II, but out of the 7-8 smog places I have taken my '96 to, he is the only guy that can even get the tester to work, let along have the car pass. Not the cheapest at $60 with the certificate, but he knows the car well enough to get teh test done right.
Niello stopped smogging cars a few years ago, I don't know if they ever restared or not.
Tom