Have you ever sent grey market Nikon camera/lens to be repaired by any non Nikon service centers?

Grey market lens - again - part available at non authorized Nikon service centers?

Grey market Nikon question: Are NIKON lens/camera parts available at non authorized service centers? Have you ever sent grey market Nikon camera/lens to be repaired by any non Nikon service centers?

I know the disadvantages of having/buying a grey market Nikon lens/camera. Nikon doesn't offer any repairs or technical support.

My question: DOES Nikon supply parts to non-Nikon authorized repair centers? I have heard that lot of grey market Nikon owners use nikoncamerarepair.com for repair. Have you used them?
nikoncamerarepair.com does repair grey market lenses but I am wondering whether Nikon supplies them the required original Nikon parts?