Dell 7820 and 5820 won't see HDD in Windows PE

I ran across this issue a few days ago and wanted to post a solution. It appears that the latest Win PE driver packs from Dell don't include the drivers you need for the 5820 and 7820. I have exported the correct drivers from the pre-installed OS and put them in a zip file here. After putting these drivers into your WIM you should be able to see the HDD.