Well I'm pleased I managed to get this done for you but not so happy to find that my '9' isn't very straight!
I've no reason to suspect that the 159 or ti badge have been replaced so I presume the '9' just wasn't put on straight in the first place.
Although I don't know how they are applied - whether the 3 numbers all go on together and should therefore go on straight, or whether it's possible to get one crooked?
Either way, these are the dimensions for mine...
I laid a straight edge along the top of the 159 and it also sat on top of the ti. And I think that straight line is horizontal, ie parallel to the ground.
The top of the 68, 69, 70 and 65 dimensions are to the top of the bodywork recess for the rear light, not the bottom of the light itself.
The 35 dim is from the centre of the 9 to the edge of the rear panel.
The 70 dim is the distance from the corner where the edge of the boot opening meets the opening for the light, down to the top of the 9, approx. where the top left radius meets the straight(ish) top of the number. Hope that makes sense