I don't think you will find the Kickoff on the 20g. And I am pretty sure you wouldn't need it on the 20g. I have the xcel and its light, fast, with easy recoil.
Look on the cabelas gun library website. They get posted on there from time to time at a good price. You can get it shipped to a cabelas near you or to an ffl of your choice. I picked up my A400 20g xcel (blue rec) for $1150ish. It was like new and even after a hard run dove season it still looks like new.