I used https://freesound.org again to find a background sound. Then I transferred it over to Audacity, and recorded my part of the radio bumper.
I can’t always think of what to say for a radio bumper, I usually go through like 10 different scripts before I find the right one and still this doesn’t even feel right. But I will say, I do enjoy making these audio assignments, like a lot. It’s super fun to make things that I’ve only been listening to my entire life; I just never knew how people made them.