As far as I know the '91-'94 models used the same style front bench seat when ordered. Remember it was about this time OSHA and CALEA mandated equipment comply with air bag deployment zones. Hence buckets, as this allowed more room to mount various bits and bobs between the seats away from the airbags. My '93 had the 45-45 front bench with the center arm rest removed to allow a shotgun to be mounted.
It is conceivable to have a 91-93, such as you have built, with buckets. BTW that photo you refer to is of bucket seats, not a 45-45 bench.
Also recall 91-93 models offered black, dk. blue and tan color interiors only. 94-96 switched to a lt blue/gray, tan, maroon (yes maroon) and charcoal.
G