Jim -
The pair of "Metallic Wineberry" (purple) Cobras you recall seeing in Charlotte belonged to Jaimie Cappola from Brooklyn, NY.
The 289 was CSX2007 - he had the car painted purple, the interior redone in beige, and added "007" embroidered floor mats, along with a number of other custom modifications. The car appeared on the ISCA show car circuit for a while as the "James Bond 007 Cobra".
The complimenting 427, CSX 3105, was painted and trimmed similarly with a beige interior. 3105 is over at Jack Roush's shop in Michigan. Rumor has it that the engine is hurt. Here is what it looks like:
regards,
Jeff