It's also not listed on the website for the Enterprise Center yet (or on TicketBastard)
This year might be different but last year at this time tickets were only available to I FUND and season ticket holders and general public tickets went on sale on November 30.
Lots of radio stations listed here on the Illini Radio Network, and you can stream it here
I believe the Busey Bank Illini Sports Network is also on SiriusXM
Peacock is $6/month with ads, $10/month for "ad free" (which they then say might still have ads, especially for sports)
I found a code to get the base level for $2/month for the first 6 months so I signed up. The code is PEA6ZW11DTP
(Dan - I hope its OK to post the code, I checked the rules...