Might check here:
Help From The Manufacturer
Also, for what it's worth, I've found RV owners manuals to be very generic. For example the manual I got with my Desert Fox Toy Hauler is the same manual I had for my 2008 Nash travel trailer... The information in them is applicable to pretty much any towable with pretty much no model specific info.
There are a couple on ebay, one for 2005, one for 2006. I bet they would be close enough to be of some help.