Ah here it is. I notice now that the Tech commentaries has this, but its uselessly small. I just took these with my camera right now so they are a bit blurry, but they are good enough for use.
As the Tech Commentaries points out though, these scales don't often correspond to the films. You can see that this is simply a rough pen sketch by Joe Johnson, just going by eye rather than any kind of measurement. When it came to the film they just did things "close" to this, whatever looked good in the frame, or sometimes imperfect because they didn't notice or didn't have the time to do it again, or outright didn't care. But the net result of all this is that the scaling in any of the films is only in a general sense, there is no actual "measurable" way to prove what it should pricisely be, you just go by eye so that it looks about right.