Do you mean the big, mostly flat dark plastic panel that extends from the windshield back to the softer plastic parts of the dash? They are available “used”, and new. Expensive, and shipping is very high - oversize and fragile. Example:
www.hawksmotorsports.com
93-96 are the same for all years and trim levels - base, Formula, Trans Am. 97-02 are different.
The 1995 “base” was available with two different V6 engines, a 3.4L OBD-1 early in the year, with a 3.8L OBD-2 added late in the model year. The latter would be the preferable engine. Both were available with either a 4L60E 4-speed auto transmission, or a T-5 5-speed manual trans.

93-96 Firebird Upper Dash Panel, OEM USED
93-96 Firebird Upper Dash Panel, OEM USED

93-96 are the same for all years and trim levels - base, Formula, Trans Am. 97-02 are different.
The 1995 “base” was available with two different V6 engines, a 3.4L OBD-1 early in the year, with a 3.8L OBD-2 added late in the model year. The latter would be the preferable engine. Both were available with either a 4L60E 4-speed auto transmission, or a T-5 5-speed manual trans.