TRENDnet TEG-S8G 8-Port Gigabit GREENnet Ethernet Switch for $19.99 shipped after code EMCYTZT2227.  Here is a screenshot for your reference.  This gigabit Ethernet switch goes up to 1000Mbps.  It is part of TRENDnet's GREENnet line and adjusts voltage as needed to reduce power usage.  Most places have it for about $31.