I think I got it! I grabbed your custom controller driver right off this file - Mod+signed Samsung NVMe drivers for HP+Dell systems - #37 by Fernando
https://winraid.level1techs.com/uploads/short-url/rsm8q9JHHNtFnvjpLrFk7zvYAfu.rar
My NVME is Samsung so it was perfect.
Thank you so much for your quick reply!