Kurt,
I'm not following you.
If the car is out there with a 'new original' (aka restamped) block, what's the difference if the full VIN from your block is out there or not? The car owner either wants your block or is happy with the restamp, but having the full VIN won't change anything IMO.
Now, if you have a car and are looking for a block, that's when a block can be restamped to fit and then represented as an original.