Mini/NANO W5100 R3 Ethernet Network LAN POE/Xbee/SD Slot for Arduino ATMega328 | eBay
Working with W5100 Shield HR911105A version with SD Card - Networking, Protocols, and Devices - Arduino Forum
W5100 Ethernet Shield Module, Network Expansion Board, Ethernet Network Shield LAN for Arduino, for UNO, for mega 1280, for mega 2560. : Amazon.co.uk: Computers & Accessories
Can't connect ethernet module to arduino - Networking, Protocols, and Devices - Arduino Forum