HELP!!! I NEED A VEHICLE IMPORT BROKER IN AUSTIN, TX

Last year the US Customs officer at Austin airport told me that because my Canadian 1991 Mazda Miata (originally sold in Canada by Mazda), was eligible for importation, but could not be imported through US Customs, I think because it was made in Japan (for the North American market), or maybe because it didn't have the anti-theft etchings on it... I can't remember which. He said therefore that I would have to go through a customs broker. He gave me the name of what was supposed to be the only passenger car import broker in the Austin, TX area. But I lost the scrap of paper the guy gave me, and now the new guy won't tell me because he's not allowed to "endorse" any brokers. My Canadian registration is about to expire and I can't extend it anymore!!! Can anybody help?