Because these cars are forgotten. Like hilariously forgotten. And that means theres no market.
Guarantee that if you went to a parts store and said you wanted something for an 89-97 Thunderbird, theyd hit Pontiac in the make slot before they hit Ford. Happened twice to me. Just get stuff from RA and Summit now.
And even if you talk to most "die hard" Ford fans they couldnt tell you any true facts about these cars. Theyd say these cars were based on their precious ******* mustang, the probe, or the crown vic. Had some dude tell me that at a car show. "Get underneath it and youll see the frame rails". Wanted to kick his teeth in.
Sorry for the rant.
And most normal people who drive these cars couldnt give a **** about finding oem parts like hubcaps or bumpers or handles. Might as well be a dodge neon to them. Beat them up, throw them out.