If you are refering to the smoker that one of the couples was using toward the end of the show it is a Brinkmann Pitmaster Deluxe Smoke 'N' Pit. I saw the name clearly.
I went online looking around for one and you can get them direct from Brinkmann. Their website is www.brinkmanncorp.com
I found the Charbroil Silver Smoker (made by New Braunfels) at Home Depot. This is a very similar smoker to the Brinkmann. The only difference I can see is the firebox is on the left. Otherwise it appears to be the same and if you have a Home Depot nearby you can get it locally and avoid any shipping charges.
Almost forgot, the only place I found that carries the Brinkmann is Ace Hardware.