NETGEAR ProSafe M4300-52G switch - fully managed - stackable - 52 x 1Gb ethernet - 2 x 10Gb SFP+ and 2 x 10Gb ethernet - rack-mountable for sale at Ahead-IT
Edimax Pro 8-Port 10GbE Web Smart Switch, server switch, storage switch, 1U rack-mount, XGS-5008 - EDIMAX
Amazon.com: 10GB SFP+ Switch (8 Port - Unmmanaged) - 10 Gigabit Ethernet at 8 Small Form-Factor Pluggable Slot for Fiber Optic (Optical Cable) Network or LAN (RJ45/CAT6+) Transceiver Devices - Tupavco TP1910 : Electronics
S5860-24XMG, 24-Port Ethernet L3 Switch, 24 x 10GBASE-T/Multi-Gigabit Ports, 4 x 10Gb SFP+, with 4 x 25Gb SFP28 Uplinks, Support Stacking, Broadcom Chip - FS.com United Kingdom
How To: Affordable 10Gb Ethernet - StorageReview.com