Amazon.com has the Sinimaka Coco Liner Roll 16x40-inch for $8.99 - 50% off w/coupon KWA3ZU8Q = $4.49. Free Shipping w/$35+ Order or Amazon Prime. (Sold by Yintong, Fulfilled by Amazon)
Note: Prices on Amazon.com fluctuate regularly, and deals can expire anytime. Refer to the post time to see when it was listed.