In search of back bench seat -- any ideas?

I have a 2011 Chevy Express 12 passenger. We just bought it from an auction. Doesn't have that back bench seat that seats 4 passengers. Any idea where I might be able to find a replacement bench?

You should go to the local junk yard, or better yet, u-pull-it place. You may need to have them call you when one comes in though.

I saw a 2002 with 4 rows of seats still intact and good shape just a few weeks ago where I live.

Depends on what condition of a seat you want, and what you're willing to pay. If you want new, a dealer site like this (http://www.gmpartsonline.net/2011-chevrolet-express-1500.html) might be your best option. If you don't mind a used one, a U-Pull-and-Pay would probably be the best.