328 RHD Air Con

If you don't find a replacement, you can repair it with fiberglass and paint it. Replace the blower motor with the much better Fial unit while you're at it.

 

If you have one now, I agree it will be easier to fix what you have than replacing it. Especially for a RHD car.

 

Pic of a repair. The fiberglass is on the inside.
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Depending on where it's broken you might not even need fiberglass if you aren't comfortable using it (it's not hard though)

I used some JB Weld (don't know if they have that in NZ) to fix the drain "nipple" on mine that got cracked and was leaking.

 

Tim Stanford is selling a 328 evaporator

https://www.ebay.com/p/1837243844?iid=166904125474

 

Hello, sorry but I can't help you but just would like to know if your GTB is one of rare original NZ car ?

 

Roger,
It is interesting that one side is thin (motor side) and brittle, and the other side is much thicker and appears to be a different material. Good luck.
BTW- if you are interested Modern AC in a 308 | FerrariChat

 

I have mine out at the moment as well, as the motor side, which appears to be brittle ABS plastic was very broken at the forward attachment point causing an air leak and condensation drainage issues. The other side of the assembly, which disburses the cold air, is fiberglass, and appears to be much more durable.

 

From France Roger