I tried, in vain, to find a carpet/upholstery shop willing to fabricate this carpet in black or from a piece of parcel shelf carpet in tan. I ended up buying this on Buyee/Yahoo Japan.
Everything is brand new, never installed. The standoff and trim ring are extremely high quality pieces, the ring is anodized aluminum. The carpet is nicely sewn and is composed of fire-retardent, felt-backed, closed-loop carpet, like the early NA's came with. The color is not a perfect match, but is close.