Apple Macbook Pro Retina 512GB SSD for Early 2015 13" 15"
1TB SSD Kit for Mac Pro - Apple (HK)
How to Upgrade a MacBook Pro With an SSD
Amazon.com: INDMEM PCIe NVMe Gen3x4 SSD 1TB 3D TLC NAND Flash Hard Drive SSD Replacement for MacBook Air 2013-2017, MacBook Pro Retina 2013-2015, iMac 2013-2017, Mac Pro 2013, Mac Mini 2014 (1TB) : Electronics
512GB version of the new MacBook Pro has a slower SSD than the Mac it replaces | Ars Technica
The next-gen MacBook Pro with Retina Display: SSD Analysis