iFixit does have some Huawei parts in stock, but unfortunately, we don’t have anything for the Matebook X Pro yet. We are adding Huawei parts as they come available to us, but I don’t have any info on when specific parts might be added. Sorry.
In the meantime, you may want to search for this part on Amazon or eBay. If you do manage to get ahold of one, our guides may be able to assist, but even if we don’t have a guide, I would encourage you to make one for other people to use!
I hope this helps! Best of luck.