Amazon.com: MokerLink 48 Port Gigabit Ethernet Switch with 2 SFP Port, Dual Power Supply, Fanless Metal Rackmount Unmanaged Plug and Play Network Switch : Electronics
Amazon.com: NETGEAR 48-Port Gigabit Ethernet Smart Switch (GS748T) - Managed, with 2 x 1G SFP and 2 x 1G Combo, Desktop or Rackmount, and Limited Lifetime Protection : Electronics
48 Port Gigabit L2+ Switch, with 6 x 10Gb SFP+ Uplinks, S3900-48T6S-R - FS.com
FS S5800-48F4SR 48-Port Gigabit SFP L3 Managed Ethernet Switch with 4 10Gb SFP+ Uplinks - FS.com Europe