i'm using the Truck Covers USA roll cover, not sure if you're interested in roll covers, but its safe, and very strong, and practically invisible from the side. it is water proof, but they had to drill some holes in the bed for the water to drip out from the ball bearings on the side. it is waterproof and it cost me 1640. unfortunately this is the only pic i have for now, I'm visiting my mother and i'm driving my car.
Tundra cover.jpg
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07 Black DC LB SR5 5.7L
-FJ Cruiser running boards
-White turn signals
-Truck Covers USA Roll cover.
---Future mods
All around Tint
CAI / Full Exhaust
Rear View Camera
HID Conversion.
02 Carbon blue Celica FF 1.8L VVT-i