I have this... it connects to my phone via Bluetooth, plugs into the cigarette lighter socket, and cost a mere $25.
It's soooo much better than having to fumble with usb cables - I can't tell you how many times the dumb thing's wire got in the way before I had this for my car. AND it wrecked the jack on my Moto G7 Play, prompting me to get a new phone - which is better, but wasn't free.
Seriously, there is no more practical option. The adapter will probably even cost more.