I am pretty sure that those are the 'new' OEM floor mats. They look just like the new OEM mats that I purchased for my 2000. The original OEM mats looked like the Zanardi mats in the SOS web site with the new mats having the plastic tabs at the back of the mat. As an observation, the new OEM mats are much thinner and lighter than the original mats and mine started to show signs of wear and tear very quickly. I ended up taking my new mats out, cleaned them and put them back in their bag and reinstalled the original mats after having them steam cleaned. I will save the new mats for some special 'dress up' occasion - whatever that might be.
In my opinion, the new OEM mats are rather 'bottom end' in quality and grossly over priced. I think there is a Prime member Hrant who fabricates mats for the NSX. Perhaps they are of better quality than the new OEM mats. In addition, the new mats are not black. They are charcoal / very dark grey.