Revolvers are available for the X. There are a couple of people that have them. I'm not sure if they're on this board though.
www.4x4parts.com sells the revolvers exclusively for the X. They also have a bulletin board with people who actually have them.
You will also find differing opinions about the need for revolvers, but it's your decision. I would listen to the varying opinions before I bought though. I'm sure you'll get some of those opinions from this board.
Wilbur