You found 2 products in Network Adapters - ExpressCard/54

Linksys EC1000 (0745883578146) Network Adapter
2500 Mbps, Internal Adapter, Cabling: Ethernet 1000Base-TX, Ethernet 100Base-TX, Ethernet 10Base-T, RJ-45
2 store offers from £34 - £44

SanDisk (SDAD-109-E11) Network Adapter
Expansion Card
2 store offers from £17 - £26