Sorry to hear that. The VIN would be very helpful, also a description with the interior color, convertible or coupe, big block or small, 4 speed or auto, wheels, etc. I'm sure the first thing the thief did was remove the license plate. Post all this info in the C1-C2 section if you haven't already done so.
Might have him contact local chapter of NCRS most of those guys keep up with cars and parts - if professionals the parts will show up at the next Pamona Swap meet in SoCal, e-bay or at Bloomignton next summer.
If he lets NCRS's know the VIN they might spot it in the data base if it ever surfaces.