g7 17 7700 add additional m.2 ssd

Im using g7 17 7700, wanted add m.2 ssd. There is a extra m.2 ssd slot to add storage but there is no bracket or adjustable standoff(dont know how it call it) so have to buy one for securing ssd. I cant find anywhere to get or how it call it. Let me know where to buy or how it call it thanks

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