No luck on tracking down the VIN so far, we don't have any of our old records.
I'm thrilled to have such a great response from other 510 owners and do appreciate any leads you can offer. I am very willing to take a similar car. The items I am firm on are:
Body style similar to the 71. (I think 68-73 are all the same).
Must be 4 door sedan.
In decent condition. I need it to be immediately drivable. Small items, some interior work and paint can all be done later.
Of course if you can find me the right 71, in good condition, Butterscotch orange and at a fair price, I'll throw in a finder's fee thank you!