128GB Kit 4x32GB DDR4-2400 PC4-19200 ECC SODIMM 2Rx8 Memory by Nemix Ram at Amazon.com
Lenovo 32GB DDR4 SDRAM Memory Module - for Notebook - 32 GB - DDR4-2666/PC4-21300 DDR4 SDRAM - 1.20 V - ECC - Unbuffered - 260-pin - SoDIMM at Amazon.com
Crucial Memory Bundle with 32GB (2 x 16GB) DDR4 2666MHz SODIMM Upgrade kit CT2K16G4SFD8266 Compatible with iMac Retina 5K 27-inch 2019 (iMac19,1) and Mac Mini 2018 (Macmini8,1) at Amazon.com