Unfortunately for you, Aurora Cars Ltd. has been out of business for decades now.
Aurora Cars produced approx. 170 GRX roadsters from 1980 to 1983. The GRX was built in Canada, but sold in the U.S. as one of the few "Cobra" replicas ever to comply with U.S. safety and emissions regulations. It sounds like yours (car #51) sat on a dealer's lot until 1984 before it was first sold.
They were located at the following address, back in the day:
Aurora Cars Limited
(div. of Grove Ridge Industries Ltd.)
36 Shelley Road
Richmond Hill, Ontario
Canada L4C 5G3
Phone +1 (416) 884-9777
You might want to try contacting the person who runs the
Aurora Cobra enthusiast website. Maybe he has some documentation which could help you.
(
Footnote: The body molds for the Aurora GRX were taken from an original 260 Cobra, CSX2013. The fiberglass bodies were produced under contract by renowned Canadian boat builders: C&C Yachts Manufacturing Ltd., Custom Division, 526 Regent Street, Box 970, Niagara-on-the-Lake, Ontario L0S 1J0, phone 416-468-2101.)