My State did the same, but never did like wearing wireless headphones. So for my one Chrysler minivan that didn't already have Bluetooth(BT), I just installed a Pyle BT capable USB FM/AM receiver found on Amazon for $49. Also needed a custom $5. wiring harness and soldered the connections which was the most time consuming part of the install. Was actually a downgrade on the Panasonic CD receiver I installed few years earlier, but not that much difference. Actually, like using a USB Flash drive instead of CDs for music files.
The BT phone function works perfectly. Will pair automatically with my smartphone when the receiver is on. Microphone is built into the receiver, along with one touch answer/disconnect with callers feed through the van's speakers. A separate wireless remote can be used to place calls.
BT also works well for streaming music files from my smartphones or tablet.