Last record I can find of CFF using 01 was back in 2006 by Jack Teague. Car was white/blue and he ran the 2nd and last race of the year.
Curiously, in 2006, the only group that seemed to know what went in the "MAKE" (of car) box at Race 13 was Group 2 drivers. Everybody else who entered said they were driving cars made by "ICSCC", "IRDC", "CACC" or "SCCA".