OWC 128GB (4 x 32GB) 2666MHz DDR4 PC4-21300 SO-DIMM 260 Pin Memory Upgrade, (OWC2666DR4S128S), for 2019 27 inch iMac (iMac19,1) and PC laptops - Newegg.com
Kingston 128GB 2666MHz DDR4 CL16 DIMM (Kit of 4) FURY Beast Black (KF4 – Network Hardwares
Axiom 128GB DDR5 4800MHz ECC RDIMM Server Memory - AX54800R40G/128G - Server Memory - CDW.com
DDR4 | 128GB [64GBx2] | ECC R-DIMM | Server Memory