Interestingly, I reckon Nissan have reproduced / remade some spares over the years.
But were Nissan actually involved? Surely Nissan wouldn't allow their branding attached to poor quality parts, what would be in it for them? More likely to be brand rip-off manufacturers.
For years there was a similar scenario with Mustang parts, poor quality repro stuff - well short of OEM standards - churned out by various mostly Asian suppliers, but unless one could find NOS parts (impossible outside of the USA anyway), or better condition used, there was no option but to buy them if the original parts were missing or beyond saving. But eventually Ford got onto it and instituted a licensing program for parts intended for their branded cars. Needless to say the quality of OEM parts for Mustangs has, in my own experience, improved a great deal.