Certainly.
Depo is an aftermarket company that makes replacement light housings for vehicles. They to my knowledge are the only ones who make replacement blinker housings for the Trans Ams. But CarID, Amazon, and Ebay have listings for these light housings.
https://www.carid.com/1998-pontiac-f...-80117444.html
Firebirds have a round housing while Trans Am have our more unique shaped housing for the bumper. So be sure you are ordering Trans Am housings.