adding armrest on bucket seats

I have an '06 Chevy Uplander. It has bucket seats (not captain seats) in the 2nd row without arm rest. I was wondering if you can add/install armrest to the bucket seats?
I was thinking that I could buy the armrest ("for the captain seats") and have them installed on the bucket seats.
I went to the dealership and they printed out a diagram of the bucket and the captain seats. They couldn't tell from the diagrams.
Any comments would sure be appreciated. Thanks!