Best Buy does this all for you for $80, assuming the person is in the US. I expect this is available most places for similar prices though. You can get anything from a BT only unit for $20 online to a much nicer unit with Android Auto/iOS’s thing. While the initial cost might be higher the opportunity cost of your thing being disabled is almost certainly much higher, as this thread’s existence seems to support. $150-$200 well worth it in the long run to do a head unit upgrade.