Both the 6120 and the 6141 are on the Time Warner approved list.
Can you find me a link to the this 6-1-4-0. Ebay would do.
wait the SB6120 is supported now?
Also I would say to anyone if you can't get a SB6141 go with the: Zoom 5341J Netgear CMD31T Motorola SBG6580
The reason I am saying this is TWC is already launching 8 channel downstream bonding and the Dallas area and NYC metro areas already have 6 channel bonding on the downstream which will probably go to 8 in 2013. Now I had heard on one of the cable tv tech forums that the Cisco 10k CMTS' were telling 4 channel modems to stop bonding on the downstream (6120, 6121, .etc) So I warn that there may be some issues in areas that have Cisco 10k's especially Austin/waco texas which seems to use 10k's as their primary CMTS brand. I know that North Texas had or has Cisco 10k's as I was on one for the longest and then got switched to a brand new Arris C4.
I personally have seen the zoom brand of modems at my local staples which is about 3 or 4 blocks from my house.