Timetec 16GB Kit (2 x 8GB) DDR4-2666 SODIMM for Mac - Timetecinc.com - Memory of Lifetime and Easy Upgrades
64GB (4x16GB) DDR4-2666MHz PC4-21300 SO-DIMM Memory for Apple 27" iMac with Retina 5K Display Mid 2020 (iMac 20,1 iMac 20,2) by NEMIX RAM System Specific Memory - Newegg.com
32GB DDR4 2666 2667 Mac Memory RAM for APPLE iMac Late 2020 MXWT2LL/A A2115 5K | eBay
Apple Memory Module 16GB DDR4 2666MHz SO-DIMMS (2x8GB) - Apple
Amazon.com: A-Tech 16GB RAM for Apple iMac & Mac Mini (2018, 2019 & 2020) | DDR4 2666 MHz SODIMM PC4-21300 / PC4-21333 260-Pin SO-DIMM Memory Upgrade : Electronics
32GB (2x16GB) DDR4-2666MHz PC4-21300 SO-DIMM Memory for Apple 27" iMac with Retina 5K Display Mid 2020 (iMac 20,1 iMac 20,2) by NEMIX RAM System Specific Memory - Newegg.com
CORSAIR Mac Memory DDR4 kit 64 GB 4 x 16 GB SO DIMM 260 pin 2666 MHz PC4 21300 CL18 1.2 V unbuffered non ECC - Office Depot