ok, I have a solution. My cigarette lighter is on only with my ignition and stays on for 10 minutes after the ignition is shut off regardless of if the door is opened or not. This means the radio can still be playing after the key is taken out, and the door is opened.. but it'll shut off 10 minutes later.
it'* better than nothing though and atleast it'll still stay on 10 minutes after I shut the car off, and it'* a fused wire and located directly under my radio. I just gotta figure out how to disassemble my center console to get to the wiring.