Corsair CMK8GX4M2A2400C14 Vengeance® LPX 8GB (2x4GB) DDR4 DRAM 2400MHz (PC4-19200) C14 Memory Kit - Black at Amazon.com
Amazon.com: OWC 8GB (2 x 4GB) PC19200 DDR4 2400MHz SO-DIMMs Memory Compatible with Mac Mini (Late 2018), 27" and 21.5" iMac (Mid 2017), and Compatible PCs (OWC2400DDR4S08P) : Everything Else
ADATA 4GB DDR4 2666 UDIMM,AD4U2666J4G19-S at Amazon.com
ADATA 8GB Premier DDR4 2400MHz 260-pin SO-DIMM Laptop Memory Single (AD4S240038G17-S) at Amazon.com
XPG Z1 DDR4 3600MHz (PC4 28800) 16GB (2x8GB) CL18-22-22 Desktop UDIMM Ram Red (AX4U36008G18I-DRZ1) at Amazon.com