A follow-up on what 200_s_awd noted, I do see ongoing requests for radio codes on 'chryslerforum.com' only requiring the s/n of the radio. Yes there are scams and others that look to charge you to look-up the code.
The radio code is tied to the radio and not the vehicle. The original VIN is used to pull the s/n of the radio installed at the factory and thusly the anti-theft code so the VIN is not required to look up the code but is necessary for the parts department to pull the info. As noted, the dealer is looking to cover their butt to be certain the radio is not stolen which is why the original VIN, receipt, first born, etc. is requested.
The radio code is tied to the radio and not the vehicle. The original VIN is used to pull the s/n of the radio installed at the factory and thusly the anti-theft code so the VIN is not required to look up the code but is necessary for the parts department to pull the info. As noted, the dealer is looking to cover their butt to be certain the radio is not stolen which is why the original VIN, receipt, first born, etc. is requested.