Cajun Archery makes a complete set-up with a Zebco 808 Bowfisher, reel seat, roller rest and two arrows. I don't know what they charge for it. Maybe Backwater Bowfishing has a price.
If you're used to an AMS retreiver, I think youmay want to get another. My experience has been that most people have a difficult time switching. Not trying to discourage you from trying a spincast. Just my observation and personal experience.(for what it's worth)