GIGABYTE PCIe M.2 SSD Leads NVMe Based SSD Development | News - GIGABYTE Global
I harvested a PCIe Gen3 x2 NVMe 1.3 SSD from my older laptop, the problem is that its length is short. I've held it in place with some tape, it should hold.
SKhynix BC711 HFM512GDHTNG-8310A 512GB MVMe PCIe Gen3x2 M.2 2242 SSD For T480 LA | eBay
5 Slot M.2 B-key SATA Base PCI-e 3.0 x2 Bandwidth Controller Card Require x16 Slot