I'm sorry for being lazy and not reading all six pages, but I read most of them.
I would be more than happy to help anyone undertaking such a project.  But I need a quick clarification that has probably been answered somewhere on this thread.
It seems some people are offering pics+measurements.  Is that OK?  Here's the cabs that I have to be measured.  Keep in mind this is a barn find and most are conversions, so if we are talking tape measure and digital camera I can handle that.  Or if the following list contains enough cabs that people need dimensions to I'll read up on Autocad and do my best.
Here are the cabs I believe I can measure accurately (most were exposed to the elements for several years and have bad bottoms so this is an incomplete list-plus I can't name all the cabs.
Super Pac Man I have 3 of these cabs but I think I only have one back, maybe none. 
Stern cab  I have two-no backs again.  These are conversions so I don't know what they were originally.  I have been told they are a common Stern cab used by Frenzy, Turtles, etc.. 
Here is a pic of what one looks like-mine have the "Stern" logo down the side like the one in that link.
Bubbles?This is a Williams cab that currently houses Yie-Ar Kung Fu.  The bottom is rough on one side so measurements might be hard, I don't know yet because I've never tried. 
 Centipede
CentipedeAgain the bottom is rough.  Currently has a Wrestling game.  But the CP is a lightly converted Centipede CP if those measurements are needed.
Pole Position UREmpty cab but I believe I have both parts to the back.  
Game PlanCurrently houses a Mr Do's Castle.  Say's it was made in 1981 in IL.
GorfNo CP, but otherwise in good shape for measuring.
Zaxxon/Congo BongoI have two.  These cabs are made of particle board and aren't worth restoring, but between the two I can get measurements.  Both are complete, lumberwise.  Lots of doors and angles on these cabs.
Universal CabThis is exactly what I have.  Universal made a lot of conversions and this seems to be their most common cab.  Awesome design.  Two-piece back, all complete.
I have others that I either cannnot think of or haven't yet ID'ed.
LMK if I can help.
-Erik