Ok, well your best best is to shop online and import as many parts as possible. Reason being, parts for the Cougar cost ALOT more hear than in the US/UK. Front headlamps can cost anywhere up to $1300 locally.
Check out
www.fordparts.com as they have a wide range of OEM parts for the Cougar (note, search under Mercury Cougar as they were branded like that in the US)