used to live in a minivan, slept on a wooden bedframe i put together so i could have storage underneath.

i've been road tripping more and want to have a bed setup back there again, but my wooden one was too bulky and i'm thinking i want something that can fold down and stow easily. pic is basically exactly what i want, but it's just not quite right for a minivan (two of the three legs are way too short to be useful in anything but an SUV)

should i DIY again? is there something good i can buy