Where are the scammers getting the data indicating the resident listed at this address drives a Toyota Camry? Obviously they don't have the data linking the car make to the owner, or else the mail would be addressed to the fiancé of the author rather than the author himself. I wonder if they are using a simple Name:Address mapping (certainly not hard to obtain) and then indexing the color and make of the cars with Google maps.

Clearly the data for name/address pairs and car/address pairs come from different sources. Otherwise there would be no false positives like the author's letter.

(Also, why don't they just use a different phone number for each letter? Or even sets of 3 letters?)