Call them back and get a copy of the oldest version they have for your model. If the floor plan didn't change over the years there is a good possibility neither did the wiring plan. Redesigning, retooling and making production line changes can be expensive so the builders try and will avoid major changes if at all possible.
Plus, even if it's only 75% applicable it's more information than you have now.
2006 Hurricane 31D built on a 2006 Ford F53