Where could I find an OEM daughterboard?

I need to find an OEM daughterboard replacement for my nexus 6P.

I've just about given up on finding one. I've already tried aftermarket parts, and none of them support fast charging or high speed data transfer. Here's what I've already tried:

-Amazon (I cannot find a well reviewed OEM daughterboard anywhere)

-Ebay (Same as Amazon)

-Global Direct Parts (They have awesome customer service, but still no luck! They said it's near impossible to get one)

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I considered trying to buy a broken 6P with a functional daughterboard. Does that sound like a reasonable plan?