I dont know the actual dimensions your looking for, but I can tell you how to get them.
Look up the specs on your guitar and find the scale length. The scale length is the length between the nut and the bridge (the length of the actual vibrating part of the strings).
Now you got one dimension for your guitar. To get all the other dimensions you need, your going to have to find a to scale picture (a dead on front view); and print it out, so you can make a few measurements. (try and get a nice larger sized picture for more accurate measurements)
First, measure the scale length in your picture. Now take that number and divide it by the actual scale length. Your answer will be the percentage of the actual size. With that percentage, you can figure out any dimension of the actual sized guitar from your picture; by dividing your measurements from your picture by the percentage you got earlier.
For example, lets say the scale length is 25". The scale length in my picture is 4.5". Dividing 4.5 by 25, I get .18. So the guitar in my picture is 18% of the actual sized guitar.
I like to do everything by hand, not because I dont have the right tools(when I do), but the results always seem better when it takes more work. You can do this other ways too on the computer in photoshop programs and stuff too. I always like to do my drawings on graph paper in .5"= 1" scale. If this all seems to complicated, you can find a few more ways in these forums.