OWC 96GB (2 x 16GB + 2 x 32GB) PC21300 DDR4 2666MHz SO-DIMMs Memory Compatible with 27" iMac w/Retina 5K (Early 2019 and up) and Compatible PCs (OWC2666DDR4S96S) at Amazon.com
CORSAIR Vengeance 32GB (2 x 16GB) 262-Pin DDR5 SO-DIMM DDR5 4800 (PC4 38400) Laptop Memory Model CMSX32GX5M2A4800C40 - Newegg.com
Crucial 16GB (2 x 8GB) 260-Pin DDR4 SO-DIMM DDR4 3200 (PC4 25600) Laptop Memory Model CT2K8G4SFS832A - Newegg.com
2GB 2 X 1GB PC3200 400MHz 184 pin DDR SDRAM Non-ECC DIMM Desktop Memory for Dell Dimension 3000 (PARTS-QUICK Brand) at Amazon.com
Corsair CORSAIR Vengeance 32GB (2 x 16GB) 260-Pin DDR4 SO-DIMM DDR4 2666 (PC4 21300) Laptop Memory Model CMSX32GX4M2A2666C18
MemoryMasters 2GB (2 X 1GB) DDR DIMM (184 PIN) 266Mhz DDR266 PC2100 Desktop Memory KIT at Amazon.com