I like this one.
https://www.amazon.com/Anker-Charger-PowerDrive-Speed-Delivery/dp/B071WYF9HP/ref=sr_1_5?keywords=PD+car+charger&qid=1571355974&sr=8-5
30W PD which is the spec for P2 Max anything above this is kind of pointless as GPD have limited current. (Discussed in this thread)