Hi Max and MF. After looking into the commodore I now know that the catcher is wrong on this mower. Well the decal is. My mower is a VG 183 A0 80-81 COMMODORE High arch.
The silverstreak has the black version of my white corvette cowling. The correct catcher for the commodore is the same as the silverstreak but without a decal.
I've attached pictures of the parts reference guide listing of the commodore, the correct catcher and official information on the correct catcher and the picture of my Commodore.
I guess victa tried to use Australian car models as names but I guess they don't sound as good as Mustang or Corvette.