well I had a guy that had a 60" I belive?? for boats from 20 feet.
They also have a Sea Anchor type that bost that you can controll how fast you drift by being able to open and close the opening from the boat!!
thats about $75
Here is a site that sell both not that it is the cheapest site but that it show pic and tells details how to use. When you get there scroll down to see details
http://www.walleyesinc.com/walleyein...ly%20%20winner