Alfa Trofeo rules are for their classes and only their "hotrod class" GTA allows no trim. The majority of those cars would struggle to get a place in the festival. John Nuttall and Mark Pearsons 105's are the exception as they both run the correct twin cam Nord engines and are fine examples of keeping to the T&C guidelines.
An exemption for bumperless 105s is the only exception as they raced in period without bumpers.
Trofeo does not cover NZ and is these day an Auckland based series.
You do a great job Ray with the ERC Series and I am not prepared to name cars as I agree with Howard's summary. Cheers, Bruce