If you ever venture over to CamaroZ28.com, Discount Tire Direct is a sponsor and there is a contact you can call. I've bought several sets of Nittos this way and they are usually about $10 less than what is advertised on their website.
Here's his info:
Chris
www.discounttiredirect.com
1-800-707-8473 ext 418
coverley@discounttireco.com