8GB DDR4 2666 2667 SODIMM Memory RAM Upgrade for APPLE MAC MINI Late 2018 A1993 | eBay
OWC 64GB (2 x 32GB) PC21300 DDR4 2666MHz SO-DIMMs Memory Compatible with Mac Mini 2018, iMac 2019 and up, Dell, HP, Lenovo, ASUS and Compatible PCs (OWC2666DDR4S64P) at Amazon.com
Apple Memory Module 16GB DDR4 2666MHz SO-DIMMS (2x8GB) - Apple
Crucial 16GB DDR4-2666 SODIMM Memory for Mac | CT16G4S266M | Crucial.com
parts-quick 16GB Memory for HP ZBook Fury 17 G7 Mobile Workstation (iCore i5,i7,i9) Compatible RAM Upgrade DDR4-2667 SODIMM at Amazon.com