The R32 defroster vents were definitely on our to-do list, but now that Nismo announced that they're remaking them we're not 100% sure if we should as well, they did however state that the vents will be 3D printed, which may be the reason as to why its a 3 piece design rather than the original 2 piece design.
That being said we were planning on remaking these using Injection moulding which is how the originals would've been manufactured, and they were definitely going to be priced lower than what Nismo is currently pricing their vents. As for the material we were looking at using AES plastic, which is like ABS plastic but has UV protection properties.
As of right now we'll just have to wait and see whether the Nismo vents are up to standard or not and we'll go from there.