JoeSchmoe,
I didn't shop around, so only know this place, but they were very accommodating. I had to smog my 91 NSX a few months ago. The first time I tested it here it failed. They had no idea why since I have so few miles on my car and always service it. they actually felt really bad for me. He said he'd do it again for free! Well, I did a little homework on NSX Prime and found that I needed to really heat up the cats and have it tested immediately thereafter, before they cooled down. So that's what I did, ran it around at high revs for almost half an hour, pulled in and had them test it right away -- it passed with NO problem. Of course, I saw them first and made sure they would take me as soon as I pulled in. They were VERY nice and even let me drive my car into the text area. Good luck.
Mark
Redwood City Text Only Smog Center
323 Woodside Road (close to El Camino/Woodside Road)
Redwood City
650-365-7664