I'm currently selling 3 utility quads and 1 possibly sounds perfect for what you need.
2006 Yamaha Kodiak 400 4X4 Automatic:
http://www.atvflorida.com/forum/index.php/topic,32613.0.html
Also the other 2 just in case...:
2006 Yamaha Grizzly 660 4X4 w/ diff lock Automatic:
http://www.atvflorida.com/forum/index.php/topic,32903.0.html
2003 Kawasaki Prairie 360 2X4 Automatic:
http://www.atvflorida.com/forum/index.php/topic,32612.0.html
-Mike
Feel free to contact me with any questions!