S5810-48FS, 48-Port Gigabit Ethernet L3 Switch, 48 x 1Gb SFP, with 4 x 10Gb SFP+ Uplinks, Stackable Switch, Broadcom Chip - FS.com
Amazon.com: YuanLey 48 Port Gigabit PoE Switch Unmanaged with 2 1000Mbps SFP Uplink, 50 Port 802.3af/at 800W High Power PoE+ Network Switch, Metal Rackmount Power Over Ethernet Switch : Electronics
FS S5800-48F4SR 48-Port Gigabit SFP L3 Managed Ethernet Switch with 4 10Gb SFP+ Uplinks - FS.com Europe
48-Port Managed Gigabit PoE+ Switch with 4 10G SFP+ Uplinks 740W TAA Compliant | Linksys: US
Cisco Catalyst 3750G 48 Port Gigabit Switch - WS-C3750G-48TS-S
Cisco SF250-48 48-Port Fast Ethernet Smart Switch SF250-48-K9-NA