Thanks for the responses.
The 1977 XC Coupe Wheels are the same as the ZJ/ZK Fairlane and they are the Volante style. They are different from the GXL wheel.
Luckily I still have the spare so I am only after 4 for my Coupe and a set of GXL wheels for my GXL.
They will turn p one day.
Here is a pictire of the Volante (the spare from my coupe).
Regards
Wayne