Did you try “tunein”?
https://tunein.com/radio/Buffalo-Bills-s275672/
Its a premium service, but you can start a 30 day free trial and then just cancel it.
Not ideal, but it might be an option at least.
Edit - just found this one, too. It links to numerous options. I didn’t try any of them, though.
http://www.freefootballradio.com/Buffalo.html