Question : Team multiple cable internet

I am looking for a way to "team" more than 2 cable internet connections.  I have used Sonicwall security appliances before to either fail from 1 connection to another or load balance between 2 connections.  Now, I want to do more than 2 connections.  Does anyone now if a larger sonicwall (2040, 3060, etc.) with 4 or more interfaces can do this, or another brand like Cisco or something.  I can get cheap 15 x 1 connections from the cable company versus paying for fiber!

Answer : Team multiple cable internet

Thanks for the update. There are plenty of Multi-WAN routers;

http://www.edimax.us/html/english/products/list-PRIrouter.htm
http://www.peplink.com/products/balance-200-300/
http://www.xincom.com/