Amazon.com: OWC 32GB (2 x 16GB) PC19200 DDR4 2400MHz SO-DIMMs Memory Compatible with Mac Mini (Late 2018), 27" and 21.5" iMac (Mid 2017), and Compatible PCs (OWC2400DDR4S32P) : Everything Else
CMS 16GB (1X16GB) DDR4 19200 2400MHZ Non ECC SODIMM Memory Ram Upgrade Compatible with Lenovo® ThinkPad L390 Yoga - C107 at Amazon.com
Amazon.com: Crucial 16GB Kit (8GBx2) DDR4 2400 MT/s (PC4-19200) SR x8 SODIMM 260-Pin for Mac - CT2K8G4S24AM : Everything Else
Corsair CMD16GX3M2A2400C11 Dominator Platinum 16GB (2 x 8GB) DDR3 2400MHz C11 Memory Kit 1.65V at Amazon.com
G.Skill 16GB (2 x 8GB) DDR3 PC3-19200 2400MHz TridentX Series CL10 (10-12-12-31) Dual Channel kit (F3-2400C10D-16GTX) at Amazon.com
G.Skill 16GB DDR3 PC3-19200 2400MHz Trident X Series CL10 (10-12-12-31) Quad Channel kit at Amazon.com