CORSAIR Vengeance Series 32GB (2x16GB) 2666MHz DDR4 C18 SODIMM Laptop Memory Black CMSX32GX4M2A2666C18 - Best Buy
Apple Memory Module 32GB DDR4 2666MHz SO-DIMMS (2x16GB) - Apple
v-Color 32GB (2 x 16GB) ECC SO-DIMM DDR4 2666MHz (PC4-21300) for NAS Micro Server/Workstation/Compatible with Synology 21 Series 2Rx8 CL19 1.2V (TES416G26D819K-VKC) at Amazon.com
OWC 32GB (4 x 8GB) PC21300 DDR4 2666MHz SO-DIMMs Memory Compatible with Mac Mini 2018, iMac 2019 and up, and Compatible PCs (OWC2666DDR4S32S) at Amazon.com