OWC 2.0TB Accelsior 4M2 PCIe SSD for 2019 Apple Mac Pro
Amazon.com: INDMEM SSD 2TB PCIe NVMe Gen3x4 3D TLC NAND Flash Hard Drive Disk 2T Replacement for Mid 2013-2017 MacBook Air, Late 2013-Mid 2015 MacBook Pro Retina, Late 2013-2017 iMac, 2013 Mac
OWC Accelsior 1A Apple Factory SSD to PCIe Adapter Card
Apple Proprietary SSDs: Ultimate Guide to Specs & Upgrades | BeetsBlog
PCIe PCI Express X4 to 16+12Pin SSD Adapter Card for 2013 2014 2015 20 – RIITOP
The Sonnet M.2 4x4 PCIe Card adds insanely-fast SSD speeds to Mac Pro
Amazon.com: Sintech M.2 NVMe SSD Adapter Card for Upgrade 2016 2017 13" MacBook PRO A1708 Non-Touch Bar Models(Only For Late 2016-Mid 2017 Year) : Electronics
SSD (NVMe PCIe) – Apple MacBook Pro A1708 (Late 2016, Mid 2017)
512GB PCIe NVMe SSD For 2016 2017 13 MacBook Pro A1708 AP1024J EMC 2978 EMC3164 | eBay
Apple 2TB PCIe NVMe Flash Storage SSPOLARIS SSD - Mac Pro 6.1 Late 2013 A1481 | eBay