You might not be able to get the VIN reflashed to the used computer at the dealer as it is likely tied into the smart key system and considered a theft related part. You might be able to get the calibration reflashed but that won't help.

New computers can be flashed at the dealer but they lock out after something like 50 starts. Beckman might be your only hope unless you want to search E bay for tools.

What specific code reader did you order?