don't know if youre still in the market for one...
I'm also looking for an NSX as well and ran into this one today.
1999 Zanardi Red/Blk, 33,101 miles, manual, asking $53,995
located at Glendale Mitsubishi in Glendale, CA (near Los Angeles)
Salesperson said that this one is #8. The guy i spoke to is George and their phone number is 866-390-9849
I didn't get a chance to check this car out myself, but it looks like it's in good shape. Only reason it's not for me is because it's red. Hope this help! Good Luck!