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
CRUCIAL CT2K32G4S266M 64GB Kit DDR4-2666 New 649528903402 | eBay
Crucial 32GB Kit (16GBx2) DDR4 2666 MT/s (PC4-21300) DR x8 SODIMM 260-Pin Memory - CT2K16G4SFD8266 at Amazon.com
Crucial 64GB (2 x 32GB) DDR4 2666 (PC4 21300) Unbuffered Memory for Apple Model CT2K32G4S266M - Walmart.com
Crucial CT2K32G4S266M 64GB (2 x 32GB) DDR4 SODIMMMemory Kit For Mac DDR4-2666/PC4-21300 CL19 1.20 V