Where can I get a Slot 2 M.2 SSD module shield for Vostro 7500?

Where can I get a Slot 2 M.2 SSD module shield for Vostro 7500?

I have been searching for days for a module shield so that I can install a SSD in Slot 2. I didn't realize it didn't come with one, and apparently it's highly specific as I can't find one anywhere that might work. I browsed all of the possible ones on Amazon, as well as all on Dell, but every configuration either locks in with a tab or goes around it to use a 2nd screw.

I found a post on Reddit from 4 years ago that says they couldn't find one, but they eventually did: The SKU is "7HDHH" and the part name is "BRKT,SSD,THERMAL,MKB N/V7"

Unfortunately, that SKU isn't found in the parts. I'm really frustrated because I have 7GB free out of 250GB and keep relying on a slow external USB SSD to hold another 200GB+ of data.