WAN/Dual 4G Load Balancing Enterprise Wireless Router High Power 300Mbps WiFi Router LTE Modem Router with Dual SIM Card Wireless Routers - Newegg.com
Pepwave 3G/4G USB Router with Load Balancing Hardware, 4 Reviews
Amazon.com: TP-Link Safestream Multi WAN Router | 4 10/100M WAN Ports w/ Load Balance Function | Portal Authencation Access Management | Abundant Security Features | Lightning Protection(TL-R470T+) : Electronics
Pepwave MAX HD2 Load Balancing/Bonding Router With 2 x Euro 3G/4G/LTE Modems<br />Hardware Revision 5 : 5Gstore.com, 4G/5G Routers, Antennas, Boosters, WiFi, IP Switches