The product is discontinued. Please find below for alternative products.
Apacer 4GB DDR3 SODIMM 12800-11 512x8 1.35V RP [DV more info
16GB 3200MHz DDR4 Non-ECC CL22 SODIMM 1Rx8 [KVR32S more info
Corsair DDR4, 2666MHz 16GB 2x 288 DIMM, Unbuffered more info
Corsair DDR4, 3200MHz 16GB 2x 288 DIMM, Vengeance more info
Synology 16GB ECC DDR4 RDIMM Module for SA3400, FS more info
Patriot PSD48G266681S, Signature Line 8B (1x 8GB) more info
Corsair DDR4, 3200MHz 16GB 2x 288 DIMM, 16-18-18-3 more info
HP 16GB DDR4-3200 DIMM (replaces 3TK83AA) [13L74AA more info
Synology RAM D4EC-2666-16G - DDR4-2666 ECC unbuffe more info
G.Skill Trident Z NEO 16G Kit 2X8G DDR4 3600MHZ [F more info
G.Skill TZ RGB 16G Kit 2X8G PC4-28800 DDR4 3600MHZ more info
Patriot PSD48G266681, 8GB Signature Line (1x 8GB), more info
GeIL 4GB Kit Ultra PLUS DDR3-1600 (2x2G) 7-8-7 DIM more info
Corsair DDR4, 2400MHz 16GB 2x 288 DIMM, Unbuffered more info
Synology 8GB ECC DDR4 DRAM Module [D4EC-2666-8G] more info   
G.Skill DDR4-3200 16GB Dual Channel [Trident Z RGB more info
G.Skill DDR4-3200 32GB Dual Channel [Trident Z Neo more info
HP 647901-B21 16GB 2Rx4 PC3L-10600R-9 Kit RAM [647 more info