Samsung 32GB DDR4 2666MHz RAM Memory Module for Laptop Computers (260 Pin SODIMM, 1.2V) M471A4G43MB1 at Amazon.com
A-Tech 32GB RAM Replacement for Samsung M471A4G43MB1-CTD | DDR4 2666MHz PC4-21300 2Rx8 1.2V SODIMM 260-Pin Memory Module 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