A-Tech 16GB Memory RAM for Dell Latitude 3500 - DDR4 2666MHz PC4-21300 Non ECC SO-DIMM 2Rx8 1.2V - Single Laptop & Notebook Upgrade Module (Replacement for SNPCRXJ6C/16G) at Amazon.com
CMS 32GB (2X16GB) DDR4 19200 2400MHZ Non ECC SODIMM Memory Ram Upgrade Compatible with Dell® Latitude 15 (3500), Latitude 3400, Latitude 3500 - C108 at Amazon.com
Upgrade Options for Dell Latitude 15 3000 3500 Laptop - Drive Solutions
16GB Memory Dell Latitude 3500 DDR4 RAM Upgrade
8GB Memory for Dell Latitude 3400, 3490, 3500, 3590 DDR4 2400 MHz PC4-19200 RAM | eBay