Since my NSX came with two pieces of normal floor carpet cut into the shape of floor mats I was more than happy to read about Kaz' experience with the company Autostyle. Their online-configuration tool isn't especially well suited for ordering NSX style mats but they are very helpful when contacting them by e-mail.
Due to the fact that my NSX does not feature mounting tabs, no corresponding fixings were ordered. Selected colours were "Anthracite Grey" for the carpet and "Anthracite Leatherette" for the binding.
The orderer mats are indeed of high quality. The overall price, including shipping, was 100 € (70 € for the mats, 30 € for shipping). Not sure if taxes will be added on top but no corresponding information has been provided so far.
I'm very happy with the results and especially about owning a set of mats that fits very well, doesn't shift around, roll up and crumble under the seat rails ..
Now all I have to do is keep them clean.