OWC 32GB (2 x 16GB) PC21300 DDR4 2666MHz SO-DIMMs Memory, Compatible with Mac Mini 2018, iMac 2019 and up, and Compatible PCs, (OWC2666DDR4S32P) at Amazon.com
HP S1 Single RAM 16GB DDR4 2666MHz CL19 Laptop Memory - 7EH99AA#ABC at Amazon.com
G.Skill Trident Z RGB Series 16GB (2 x 8GB) 288-Pin SDRAM (PC4-25600) DDR4 3200 CL16-18-18-38 1.35V Dual Channel Desktop Memory Model F4-3200C16D-16GTZR at Amazon.com
Axiom 8GB DDR4 SDRAM Memory Module - 8 GB (1 X 8 GB) - DDR4-2666/PC4-21333 DDR4 SDRAM - 1.20 V - 288-Pin - DIMM 4VN06AA-AX at Amazon.com
Kingston 16GB DDR4 SDRAM Memory Module at Amazon.com
Kingston 16GB DDR4 SDRAM Memory Module at Amazon.com
Amazon.com: Add On 8GB DDR4 SDRAM Memory Module : Electronics
Micron 32GB DDR4 SDRAM Memory Module at Amazon.com