MEM-2900-1GB=1GB DRAM Memory for Cisco Router 2901,2911,2921 at Amazon.com
parts-quick M-ASR1K-RP2-16GB 16GB (4 X 4GB) DRAM Memory for Cisco ASR 1000 Series RP2 at Amazon.com
Cisco UCS-ML-1X324RU-A Memory 32GB PC4-2133P
CISCO MEM-2951-512MB 512MB DRAM Memory DIMM For Cisco 2951 Routers
CMS 512MB (1X512MB) DDR1 2100 266MHZ ECC Registered DIMM Memory Ram Upgrade Compatible with Cisco® 2811 Router Main Memory DMemory Ram Upgrade2811-512D for Server Only - C89 at Amazon.com