LISEN Direct via Amazon has LISEN Tablet Holder for Car Headrest on sale for $9.99 - $5 off when you apply promo code CXDRQJTY at checkout = $4.99. Shipping is free with Prime or on $35+ orders.

Thanks to Deal Hunter babgaly for posting this deal.

Features:

• Unique triangular structure is durable and more stable and sturdy than other straight structures
• Can accommodate a large iPad
• Multi-angle rotation function and adjustable viewing angle
• Case friendly
• Back is foldable and retractable; can widely adapt to the distance of 1.6-6.9 inches of the car back seat pole
• Requires car headrest rods