AINOPE US via Amazon has AINOPE 36W QC 3.0 Metal Dual-Port Car Charger for $12.99 – 5% off when you clip the coupon on the product page – $6.50 off when you apply the promo code 5023OBJG at checkout = $5.84. Shipping is free w/ Prime or on orders $25+.
Note: Coupons are usually limited to one per account.