The NX model is even more difficult to find seals for in the USDM. There are SHIT TONS of NX in Europe and perhaps why you believe this is not a problem. Of all the things I have seen become difficult to acquire in the past fifteen years..... I would say that NX rubber seals are the most difficult thing to find in regards to seals on the B13 chassis.
No one can step up to a group buy when there is no talk of it. Perhaps you can become the catalyst?