Raritan Paragon UMT1664 (P2-UMT1664S) Expansion Module External 3 store offers from £53 - £65
APC SmartSlot Interface Expander AP9607 Expansion Module 3 store offers from £66 - £78
Hewlett Packard ProCurve (J8435A) Expansion Module 10000 Mbps, Plug-In Module, Cabling: Ethernet 10GBase-CX4 3 store offers from £1052 - £1380
Hewlett Packard (EU054AA) Expansion Module 1 store offer at £13
D-link (DEM-210) Expansion Module SFP (mini-GBIC) Interface, Cabling: Fiber 2 store offers from £159 - £161
D-link DES-102F (790069232732) Expansion Module Cabling: Fiber, Network 3 store offers from £87 - £115
Videk (2494HD) Expansion Module USB 2.0 Interface 1 store offer at £74
StarTech.com (PCI2S1P) Expansion Module PCI Interface, Cabling: Parallel, Serial 4 store offers from £20 - £26
DIGITUS DUAL SERIAL CARD - PCI (4016032102243) Expansion Module PCI Interface, Cabling: Serial 1 store offer at £23
Hewlett Packard (J8434A) Expansion Module Cabling: Fiber, Ethernet 10GBase-CX4 3 store offers from £703 - £920