In Atlanta, two options.
there are three Pull-a-Part locations. You can go online, pullapart.com, and plug in the locations, the make, the model, and the year(s), and it’ll list the matching vehicles in each yard as well as the other-year vehicles. But you’d have to search Town car and Crown Victoria and LTD, etc., separately. Then you would have to go to the yard and see if your part is there and pull it yourself. If you go, rent a golf cart for five dollars +5 dollars an hour, it’ll be the best 10 bucks you ever spend. Otherwise you’re trekking with a wheelbarrow.
The other option is Dekalb Salvage. They’re on the network of old school salvage yards that talk to each other about the parts you’re looking for. If they don’t have it, one of the yards on the network might have it. And they’ll pull it for you & you just go pick it up. Dekalb Salvage has also given me leads on inexpensive but good mechanics. That’s how I found the guy to swap my ranger engine.
And craigslist is pretty hot down here too. You have to search by every possible word and combination and category, but a lot of the country folk part out their trucks and cars themselves, or you could find the whole thing cheap like I did on the 87 Ranger. Think tool box, toolbox, truckbox, truck box, job box, gang box, etc. some of the best bargains I find are because the listing person misspells it or puts it in the wrong category. You can also post “wanted“ listings on craigslist. For our kind of stuff, I don’t post under car parts, I just post under “for sale,” “wanted” or “General.” in wanted, I usually post a custom graphic picture that has a bright wanted half screen with a picture of the item I’m looking for on the other half of the screen. I’ve had pretty good luck.
Here’s my wanted pic if it helps.