Timetec 32GB KIT(2x16GB) Compatible for Apple DDR4 2666MHz / 2667MHz for Mid 2020 iMac (20,1/20,2) / Mid 2019 iMac (19,1) 27-inch w/Retina 5K, Late 2018 Mac Mini (8,1) PC4-21333 /PC4-21300 MAC RAM at Amazon.com
16GB DDR4 2666MHz Non-ECC Laptop RAM | Integral Memory
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
4GB Adata AD4S26664G19-BGN DDR4-2666 PC4-21333 SoDimm 260-Pin 1.2V [AD4S26664G19-BGN] - $33.99 : Professional Multi Monitor Workstations, Graphics Card Experts