Hypertech has a Power Programmer for 1997.
Diablo's Predator goes back to 1998 but you could call and check to make sure there is no PCM version overlap. The SCT Xcalibrator handles PCMs back to 1996 but the original version doesn't allow end user customization. You have to have their tuning software. They have a new version out, Xcalibrator 2, but it won't support full end user customization until a later firmware release.
Dan
2003 Cobra convertible With some stuff and things