If you are looking to add extra cup holders, I would like to recommend this one.
I bought mine from Cabellas but if you do an internet search "mugger cup holder" it will pull quite a few.
It installs in 2 minutes, expands/contracts for various cup sizes and folds neatly away when you don't need it. Best of all, my kids haven't broken them after almost a year.
I know, I know, it is only a cup holder but if you have kids they are surprisingly important.