Are parts hard to get for the 1992 oldsmobile 88

Some parts are hard to get for ANY 18-year-old car. Routine maintenance items (belts, hoses, bearings, etc) should be fine.
Plastic trim pieces, weatherstripping, etc might be a little harder to come by. Durable parts (door handles, body panels, etc) you might have to get from an auto recycler (junkyard).