CORSAIR 16GB (2 x 8GB) 204-Pin DDR3 SO-DIMM DDR3 1333 (PC3 10600) Memory for Apple Model CMSA16GX3M2A1333C9 - Newegg.com
USA-CA] [H] MacBook Pro (15-inch, 2018) / 2.9 GHz 6-Core i9 / 32 GB RAM / Radeon Pro 560X / 2 TB SSD [W] PayPal, local cash : r/appleswap
Memory upgrade kit 8gb/16GB for Macbook Pro with upgrade kit (2011-2012 - Corsair) - macupgrade.eu
Photo tutorial: Upgrading a MacBook Pro with an SSD | Computer Memory Blog – hints & tips, know-how, wiki, tutorials, troubleshooting, news, purchasing advices
How to install an SSD on a 15-inch Retina MacBook Pro